Fixed the pot generation scripts.

I changed the -k parameters format so that they follows xgettext’s doc
and work here. The generate_menu_pot.pl was missing some of the strings.
The parsing code had trouble with some multiline functions and missed
some of the MULTI() choices values. As much of the code was duplicated,
I rewrote it with a rexexp approach, making it smaller and hopefully
more systematic.
Made createserver.menu translation-friendly.

Use the macros xgettext is aware of (added a new one though), so that
we can get all the strings translated in the Create Server menu.
Fix range markers for blueprints.

Also refactor a bit to use the same code for buildables and blueprints.
Remove unused file streaming stuff
Add pmove_accurate

Keeps us from rounding the components of a player's velocity to integers after each pmove. This eliminates the cause of framerate dependent physics without the drawbacks associated with pmove_fixed.
Get compilation working on (recognised) non-x86 architectures.

Essentially, don't try to build x86-specific code.
Also, mark as ‘no compiled VM’.
Optimize MatrixMultiply functions

Remove a bunch of arithmetic operations by noting that 0*x == 0 and 1*x == x.
Fix the build on Mac OS X.

(Reported and solved by rhez.)
Merge commit 'd906ed469f6ec0e0145bf7801ddfbfe6d61072a8'
Revert an unintended change in commit 4cc13628 which broke VS.
Fix Mac build using clang

__MACOS__ isn't defined for clang but __APPLE__ is defined for clang
and gcc.
Update GLEW to 1.9.0. Remove unncessary GLEW files.
Add internal WebP compilation. Refactor libwebp folder.
Add MSVC versions of some macros

TODO: Add MSVC version of NORETURN using __declspec(noreturn)
Fix Linux builds
Speex is not required to build the server
Avoid “too many target_locations” on startup (game.so, static init).
Have ‘destroyed’ (build log) shown in a different colour.
Make door trigger range mapper controllable and increase its default value by 20%.
Rewrite BoxOnPlaneSide

From ioquake3 revision 1635
New version is shorter and faster than both the original C and the asm.