General editing of the page on how to set up a development
environment, including:
- Documented which packages you need to install on Fedora-based
systems in order to run a development environment.
- Documented prereqs for setting up on Mac OS X
- Reorganized some sections
- Word wrapped text to 78 columns
- Removed steps to install pep8/pylint, this is now done automatically.
- MacOSX -> Mac OS X
Also, some minor edits:
Change-Id: I6f6181b3f3332fec93bc55897c7b9bdc50926908