Extra expression functions for the QGIS expression engine that didn't make it into QGIS 2.0

Contributors welcome :)

Current functions so far ---------------------

ramp_color_rgb -> Return just rgb from the given color ramp

red()
green()
blue()
alpha()
hue()
saturation()

Functions used from this project will not be available in other QGIS installs without first installing and enabling this plugin.