Fixed the MonoGame documentation style for embedding into the website.
TOC no longer shows any scrollbars.
Change of content or TOC size will update the window scrollbar.
When changing content we now scroll to the top of the page.
Removed C++ from syntax examples.
Updated copyright headers on the MonoGame style.
Added some consistent padding to the bottom of the TOC and content.
Fixed and simplified section toggles.
Content sizing on Chrome correctly shrinks in size.
Tweaked the font and colors to match the website.
Fixed alignment of non-expandable topics.
Flattened the look of the tables and tabs.
Removed the HRs in the sections.
Added introduction section.
Cleaned up pages a bit.
Fixed some exceptions in the scripts.
Merge pull request #2518 from SickheadGames/docs

Documentation Style Fixes
First draft of FNA extension 'GamePad.GetGUID'
Update Assimp library.
Merge pull request #2526 from JamesLupiani/Assimp

Update Assimp library.
GetGUID now supports SDL_joysticks
Fix XInput ID for Windows GUID
Merge back from develop, no-op