Added Paragraph on PyCharm

Author: Johannes Seitz

docs/starting/dev-env.rst

@@ -61,9 +61,10 @@ the following lines into your vimrc::
 IDEs
 ::::
 
-PyCharm
--------
+PyCharm / IntelliJ IDEA
+-----------------------
 
+PyCharm is developed by JetBrains, also known for IntelliJ IDEA. Both share the same code base and most of PyCharm's features can be brought to IntelliJ with the free `Python Plug-In<http://plugins.intellij.net/plugin/?id=631/>`_..
 
 Eclipse
 -------