Update version string.
Remove a bug warning.
Update Misc. and OpenGL Notes documentation.
Update the Get Started page to bring in line with recent changes.
Add a Platforms and Requirements reference page.
Some rewording to make things sound a bit better.
Improve the language in the OpenGL Notes page.
Add a Tips, Tricks and Quirks page.
Improve styling.
Add a reference page for GUI styling.
Some language improvements.
Add a link to the GUI styling reference page from the GUI tutorial.
Update GUI documentation.
Update Downloads page.
A small change to some text for consistency.
Remove a comment about an old bug.
Update downloads page to remove the Linux build.
Change the base URL in preparation for merging.