Add badges. Closes #33.

README.rst

@@ -1,3 +1,23 @@
+.. image:: https://travis-ci.org/onyxfish/leather.png
+    :target: https://travis-ci.org/onyxfish/leather
+    :alt: Build status
+
+.. image:: https://img.shields.io/pypi/dw/leather.svg
+    :target: https://pypi.python.org/pypi/leather
+    :alt: PyPI downloads
+
+.. image:: https://img.shields.io/pypi/v/leather.svg
+    :target: https://pypi.python.org/pypi/leather
+    :alt: Version
+
+.. image:: https://img.shields.io/pypi/l/leather.svg
+    :target: https://pypi.python.org/pypi/leather
+    :alt: License
+
+.. image:: https://img.shields.io/pypi/pyversions/leather.svg
+    :target: https://pypi.python.org/pypi/leather
+    :alt: Support Python versions
+
 Leather is the Python charting library for those who need charts *now* and don't care if they're perfect.
 
 Leather isn't picky. It's rough. It gets dirty. It looks sexy just hanging on the back of a chair. Leather doesn't need your accessories. Leather is how Snake Plissken would make charts.