cc license for images (#85)

LICENSE-CC-BY.txt

@@ -0,0 +1,22 @@
+mlxtend documentation figures (c) by Sebastian Raschka
+
+mlxtend documentation figures are licensed under a
+Creative Commons Attribution 4.0 International License.
+
+<http://creativecommons.org/licenses/by-sa/4.0/>.
+
+You are free to:
+================
+
+Share — copy and redistribute the material in any medium or format
+Adapt — remix, transform, and build upon the material
+for any purpose, even commercially.
+The licensor cannot revoke these freedoms as long as you follow the license terms.
+
+Under the following terms:
+==========================
+
+Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
+
+No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.
+

README.md

@@ -18,7 +18,7 @@
 
 **Mlxtend (machine learning extensions) is a Python library of useful tools for the day-to-day data science tasks.**
 
-- This open source project is released under a permissive new BSD open source [license](./license) and commercially usable
+
 
 <br>
 
@@ -154,6 +154,12 @@ If you use mlxtend as part of your workflow in a scientific publication, please
 
 ---
 
+## License
+
+- This project is released under a permissive new BSD open source [license](`[LICENSE-BSD3.txt](https://github.com/rasbt/mlxtend/blob/master/LICENSE-BSD3.txt)`) and commercially usable. There is no warranty; not even for merchantability or fitness for a particular purpose.
+- In addition, you may use, copy, modify and redistribute all artistic creative works (figures and images) included in this distribution under the directory 
+according to the terms and conditions of the Creative Commons Attribution 4.0 International License.  See the file [LICENSE-CC-BY.txt](https://github.com/rasbt/mlxtend/blob/master/LICENSE-CC-BY.txt) for details. (Computer-generated graphics such as the plots produced by matplotlib fall under the BSD license mentioned above).
+
 ## Contact
 
 I received a lot of feedback and questions about mlxtend recently, and I thought that it would be worthwhile to set up a public communication channel. Before you write an email with a question about mlxtend, please consider posting it here since it can also be useful to others! Please join the [Google Groups Mailing List](https://groups.google.com/forum/#!forum/mlxtend)!

docs/sources/index.md

@@ -5,7 +5,6 @@
 
 **Mlxtend (machine learning extensions) is a Python library of useful tools for the day-to-day data science tasks.**
 
-- This open source project is released under a permissive new BSD open source [license](./license) and commercially usable
 
 ![Python 2.7](https://img.shields.io/badge/python-2.7-blue.svg)
 ![Python 3.5](https://img.shields.io/badge/python-3.5-blue.svg)
@@ -29,7 +28,6 @@
 <hr>
 
 
-
 ## Examples
 
 ```python
@@ -98,6 +96,12 @@ If you use mlxtend as part of your workflow in a scientific publication, please
 ```
 
 
+## License
+
+- This project is released under a permissive new BSD open source [license](`[LICENSE-BSD3.txt](https://github.com/rasbt/mlxtend/blob/master/LICENSE-BSD3.txt)`) and commercially usable. There is no warranty; not even for merchantability or fitness for a particular purpose.
+- In addition, you may use, copy, modify and redistribute all artistic creative works (figures and images) included in this distribution under the directory 
+according to the terms and conditions of the Creative Commons Attribution 4.0 International License.  See the file [LICENSE-CC-BY.txt](https://github.com/rasbt/mlxtend/blob/master/LICENSE-CC-BY.txt) for details. (Computer-generated graphics such as the plots produced by matplotlib fall under the BSD license mentioned above).
+
 ## Contact
 
 I received a lot of feedback and questions about mlxtend recently, and I thought that it would be worthwhile to set up a public communication channel. Before you write an email with a question about mlxtend, please consider posting it here since it can also be useful to others! Please join the [Google Groups Mailing List](https://groups.google.com/forum/#!forum/mlxtend)!

docs/sources/license.md

@@ -1,4 +1,10 @@
-# License
+- This project is released under a permissive new BSD open source license and commercially usable. There is no warranty; not even for merchantability or fitness for a particular purpose.
+
+- In addition, you may use, copy, modify and redistribute all artistic creative works (figures and images) included in this distribution under the directory 
+according to the terms and conditions of the Creative Commons Attribution 4.0 International License. (Computer-generated graphics such as the plots produced by matplotlib fall under the BSD license mentioned above).
+
+
+# new BSD License
 
 ---
 
@@ -30,4 +36,28 @@ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+# Creative Commons Attribution 4.0 International License
+
+
+mlxtend documentation figures are licensed under a
+Creative Commons Attribution 4.0 International License.
+
+<http://creativecommons.org/licenses/by-sa/4.0/>.
+
+#### You are free to:
+
+
+Share — copy and redistribute the material in any medium or format
+Adapt — remix, transform, and build upon the material
+for any purpose, even commercially.
+The licensor cannot revoke these freedoms as long as you follow the license terms.
+
+#### Under the following terms:
+
+Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
+
+No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.
+