doc: cosmetic

Windows: defaults to use MATLAB 2010B for compilation

This is done in order to create redistributable binaries that are more compatible.
However, there is no need to use an old MATLAB to compile the library.

dist.mak: fixes packaging on host not definint TMPDIR

make: fix parallel compilation

doc: fixes generation of figures in Doxygen documentation

lbp.h: adds missing guards

Makefile.mak: bugfixes

vl_xmkdir.m: update style and improves code comments

mexutils.h: refactors a function name and adds string comparison func…

…tions

doc: fixes copyright dates