Linux 32-Bit drawtext plugin rebuilt with fix for idiotic bug.

Because the -l linker specs were defined *before* the c code, no
dependencies on the required GL, fontconfig and freetype libraries were
encoded in the plugin! Worked by accident on 32-Bit octave on Linux,
but not on 32-Bit Matlab, because octave also links against freetype et
al., but Matlab doesn't.
Screen/Linux: Don't #include glxew.h in anything but Screen!

No need to include it in builds for WaitSecs, GetSecs and other
non-OpenGL related mex files! Caused build failure on the old
NeuroDebian 6.0 build system with the new GLEW 1.9 version.
PsychGLGlue: Build fixes for MS-Windows.

The usual MSVC compiler crap.
Screen: Update wglew.h to latest from GLEW 1.9.

Forgot to do that, so build failure on Windows was the result. No
everything is up to date and at state of GLEW 1.9.
Update all makefiles for new name ftglesGlue.cpp -> ftglesGlue.c

C++ build ends badly on Octave + OSX. Rename the file to a C file, so
all compilers are happy. Rename happened already in a previous commit,
as did fixing a small compile failure on a pure C compiler.
MorphDemo: Use GL_CLAMP_TO_EDGE instead of GL_REPEAT

Some older OpenGL implementations don't like GL_REPEAT.
PsychImaging: Fix panelfitter setup on weird display resolutions.

Add some round()ing to make sure Screen('Panelfitter') always receives
integral fitter parameters, even on displays which have a weird
resolution that causes fractional fitter parameters.
Almost all MEX files for all desktop PTB's rebuilt, except the ARM/Nexus ones.

Rebuilt all mex files for all supported platforms to make sure the
wafflegles branch doesn't introduce build or execution regressions.
Tested on all platforms. Only DataPixx, Eyelink (some), pnet haven't
been rebuilt/retested, as there wasn't any change since last beta
update.

The Linux mex files for desktop have been built with the classic
X11/GLX backend, not waffle, as waffle backend is only for testing and
prototyping atm., and for ARM/Nexus-7/embedded/tablet support.