Added oxyPT dataset to provide a complete, non-toy example for automatic
binning and visually checking the bins.
Updated gui to use a toolbar instead of individual buttons. Added color
to small peaks. NB: very small peaks are still picked up by the binning
algorithm, but are invisible in the scanGel plots. This isn't a problem,
but might raise concerns with users. Probably should exclude small peaks
from fsaRGbin.
Minor clean up, removed cruft from DESCRIPTION and typos in rawgenoBin.R