doc/install/windows: require Go 1.3, reccomend TDM GCC
doc/install/linux: require Go 1.3
Add template for previous two commits.
faq: add entry on OpenGL 2 reasoning
faq: revise statement on level editors
doc/install, doc/platform-support, pages/news: Add OS X support
home: mention OS X and why OpenGL 2
faq: don't question best of all
doc/roadmap: remove OS X from future platforms
news/2014/Mac OS X Support: grammer and things
doc/install/osx: clarify brew installation