Remaining Screen mex files for Linux rebuilt.

64-Bit Octave, 32/64-Bit Matlab rebuilt.
32-Bit Octave already in previous commit.
This is the final set of Mex files for the beta release. Everything
tested to death. Intel gpu's now work reasonable ok:

With the broken drivers (v2.20.15 and earlier), UXA works well:
Triplebuffering is detected and reported to user with info what to do.
Broken swap scheduling is detected and automatic fix applied which
fixes it perfectly reliably - although at cost of slightly lower
performance under heavy load. SNA is hopeless: Gets reported as broken,
but absolutely no way to fix it - except for a driver upgrade.

Intel drivers of v2.20.16 and later (source release at 15th December
2012) are bug-free wrt. to swap scheduling and timestamping for our
purposes. Screen handles them properly, both with UXA and SNA path.

Tested on HP Mini Atom Netbook (Dualcore Atom 1.6 Ghz, 2 GB RAM, Intel
GMA-950 / Intel 945 GME chipset, aka Gen3 hardware), tested on 32-Bit
Ubuntu 12.10 with 2.20.9 driver of distribution and with self-compiled
2.20.17+ driver from current intel master repo.

-> Mex files ready for release.