LittleCMS 2.11

Due to some errors found in 2.10, I have packed this new released with all known blockers hopefully solved. Actually, a slight misinterpretation of a feature can have catastrophic consequences for other big packages that relies on this library, so I prefer to do a new release few days after 2.10 and keep good mood.

As a plus, the documentation is now on ODT format, which reduces greatly the package size. The final tarball is reduced from roughly from 14 Mb to 6Mb. Not bad, as there is no need to make a separate package with no documentation anymore. Never mind, I really didn't like the idea of code without documentation at all.

Fixed glitches:

GIMP was affected by a copy-alpha bug on double formats that prevented some brushes to work.
There was a race condition in create context. Was there since 2.2. Very hard to reproduce.
fast float plug-in didn´t work for linux because a bogus __cpuid() call for SSE2 detection.
LUT16 on V2 Profiles matrix was wrong on multichannel.
Create transform optimization may fail in some combinations.
Some of those bugs were serious enough to do a maintenance release, so here it is.