trivial: Fix regression when porting to libgusb 0.2.2
trivial: Remove colorhug-profile debugging program

It was only useful when playing with the measure mode on v1 hardware.
trivial: Don't hardcode the system datadir
trivial: Do not use the generic icon for colorhug-refresh
trivial: Fix make distclean
trivial: Fix make check due to underlinking
trivial: Generate .ico files if windres is available
trivial: Don't use g_build_filename to construct URIs

This doesn't work on Windows for obvious reasons.
Add windows resource files for all executables
Add a NSI script to build the Windows installer

Phew -- a long night of hacking just for one file...