Add more information about pydicom purpose (#1709)

* Add more information about pydicom purpose

- slightly adapt the issue templates

.github/ISSUE_TEMPLATE/bug_report.md

@@ -19,19 +19,9 @@ How to reproduce the issue. Please include a minimum working code sample, the
 traceback (if any) and the anonymized DICOM dataset (if relevant).
 
 **Your environment**
-If you're using **pydicom 2 or later**, please use the `pydicom.env_info`
-module to gather information about your environment and paste it in the issue:
+Please use the `pydicom.env_info` module (available in **pydicom 2 or later**)
+to gather information about your environment and paste it into the issue:
 
 ```bash
 $ python -m pydicom.env_info
 ```
-
-For **pydicom 1.x**, please run the following code snippet and paste the
-output.
-
-```python
-import platform, sys, pydicom
-print(platform.platform(),
-      "\nPython", sys.version,
-      "\npydicom", pydicom.__version__)
-```

.github/ISSUE_TEMPLATE/feature_request.md

@@ -9,6 +9,8 @@ assignees: ''
 
 **Is your feature request related to a problem? Please describe.**
 A clear and concise description of what the problem is. Example: I'm always frustrated when [...]
+Please take into account that *pydicom* is a general-purpose framework and 
+does not handle the specifics of individual SOP classes.
 
 **Describe the solution you'd like**
 A clear and concise description of what you want to happen.

.github/ISSUE_TEMPLATE/other_issues.md

@@ -1,8 +1,7 @@
 ---
 name: Other issues
-about: For all other issues (help needed, general query, discussion, etc).
+about: For all other issues. Please consider creating a discussion item 
+instead if you have a question, an idea, or a general discussion item.
 title: ''
-labels: question
 assignees: ''
-
 ---

README.md

@@ -9,11 +9,23 @@
 
 # *pydicom*
 
-*pydicom* is a pure Python package for working with [DICOM](https://www.dicomstandard.org/) files. It lets you read, modify and write DICOM data in an easy "pythonic" way.
+*pydicom* is a pure Python package for working with [DICOM](https://www.dicomstandard.org/) files.
+It lets you read, modify and write DICOM data in an easy "pythonic" way. As a pure Python package,
+*pydicom* can run anywhere Python runs without any other requirements, although if you're working 
+with *Pixel Data* then we recommend you also install [NumPy](http://www.numpy.org).
 
-As a pure Python package, *pydicom* can run anywhere Python runs without any other requirements, although if you're working with *Pixel Data* then we recommend you also install [NumPy](http://www.numpy.org).
+Note that *pydicom* is a general-purpose DICOM framework concerned with 
+reading and writing DICOM datasets. In order to keep the 
+project manageable, it does not handle the specifics of individual SOP classes
+or other aspects of DICOM. Other libraries both inside and outside the
+[pydicom organization](https://github.com/pydicom) are based on *pydicom* 
+and provide support for other aspects of DICOM, and for more 
+specific applications.
+
+Examples are [pynetdicom](https://github.com/pydicom/pynetdicom), which 
+is a Python library for DICOM networking, and [deid](https://github.com/pydicom/deid),
+which supports the anonymization of DICOM files.
 
-If you're looking for a Python library for DICOM networking then you might be interested in another of our projects: [pynetdicom](https://github.com/pydicom/pynetdicom).
 
 ## Installation
 
@@ -110,7 +122,12 @@ plt.show()
 
 ## Contributing
 
-To contribute to *pydicom*, read our [contribution guide](https://github.com/pydicom/pydicom/blob/master/CONTRIBUTING.md).
+We are all volunteers working on *pydicom* in our free time. As our 
+resources are limited, we very much value your contributions, be it bug fixes, new 
+core features, or documentation improvements. For more information, please
+read our [contribution guide](https://github.com/pydicom/pydicom/blob/master/CONTRIBUTING.md).
 
-To contribute an example or extension of *pydicom* that doesn't belong with the core software, see our contribution repository:
+If you have examples or extensions of *pydicom* that don't belong with the 
+core software, but that you deem useful to others, you can add them to our 
+contribution repository:
 [contrib-pydicom](https://www.github.com/pydicom/contrib-pydicom).