Merge pull request #183 from xScooper/master

Fix for issue #178
Fix: hardcoded pointer size, segfault on 64 bit Linux
Fix: added missing _isnan macro for Linux
Change: minor modification for qsort parameter
Added a PROPER section for buying the game

Added a few links to places where you can obtain the game, finally figured out how to do it.
Merge pull request #185 from liamdawe/patch-1

Added a PROPER section for buying the game
Merge pull request #184 from exander77/master

Fixes for building on 32 and 64 bit Linux
Added a few helper macros, which I will be using later on.
Adds the "forcesight" surface type to MP.
Currently the renderer skips them for now until RDF_ForceSightOn renderflag is implemented.
Batch of fixes for the cl_cin code in MP (from ioq3)
- "From ludwig: Unsigned overflows don't work in 64bit address space ..."
- "Removed seemingly unnecessary OS X implementation of yuv_to_rgb24"
- "use memcpy for copying stuff around to fix alignment problems"
- "Removed strange MacOS X #ifdeffery from cl_cin.c (from tjw)"
- "fix crash with videos on ppc (bugzilla#2523,3802). Patch by Przemysław Iskra"
- "Allow ingame videos to be re-enabled (bugzilla#4744)"
- "Support non-256x256 videos in shaders, by Zack Middleton (bugzilla#4745)"
- "Fixed some function name comments in cl_cin.c"
- some gcc 4.3 warning fixes
- Removed streaming file usage from cl_cin (its unused anyway)
Clean up: include guards, unused files. various fixes after running static analysis on gamecode: variable name collisions, buffer overruns, logic errors, access violations
Test fix for documents folder homepath on windows.
Revert "Test fix for documents folder homepath on windows."

This reverts commit 16d528c040bde06e2ce7e01c7b2da76d212751cb.
Don't remove winquake.res from the .gitignore again or I will murder you in your sleep.

... :)
Inlined com_clamp and com_clampi
Added Com_AbsClamp and Com_AbsClampi (because some joker deleted my macro for ABSCLAMP)
Fixed issue with unresolved external on Com_Clampi that I didn't check before I commited (:D)
Analog joystick improvements to walk animation (caution: slight pmove change, nothing to worry about though, promise)
Added Sil's fix for viewmodel weapons back in as an #ifdef. It doesn't work for me personally, but it works for some. Good 'nuff.
Should fix #137