Fix compilation of VCMatrix
fixturegroup: hash usage optimization
qlcfixturemode: do not rebuild a complete vector each time we fetch the heads
fixturehead: rgbchannels and cmychannels container: list -> vector
genericfader: hash usage optimization
rgbmatrix::insertstartvalues: hash usage optimization
qlcfixturemode::channel: less code, same effect
WebAccess: moved CSS/JS code out of QLC+

The resources needed are now separate files loaded upon request that can be modified by users
Merge pull request #372 from plugz/rgbmatrix-speedup

Rgbmatrix speedup
Plugins/MIDI: improved template loading debug message
Input Profiles: added KORG nanoPAD2 profile (thanks to Daniel Åhr)
Doxygen improvements