Corrected libfreenect.h location.

This is the location that the libfreenect-dev package uses on Lubuntu 13.04: http://packages.ubuntu.com/raring/all/libfreenect-dev/filelist .
remove make -j3 flag for mingw installs; was causing lock ups
Merge pull request #20 from DrewRWx/freenect_fix

Corrected libfreenect.h location.
add MIDIMessageHandler C++-style handler
add MIDI-in example using App
doxygenate; fix write method example
const corrections
change default z arg of translate to 0
glyph horizontal centering
link to P. Bourke source
comments
comments
add ortho2D
set from another matrix
fix toQuat to not return reference to temporary!
replace gluOrtho2D call
const cleanup
move Matrix4::print to base class
include last char offset in string width
add font example