Removed the R not found message box from the initialization
routine.

This was happening outside the applications main event
loop and causing things to permenently hand.
Added Three band rasters to the output options
Fixed bugs where 1.2 prerelease
session folders would not open
in 1.2 final
A couple of minor bug fixes
Changed block size and algorithm to check if we
need to use the efficient background selection
method.
Fixes Jira 206
Deviance not showing up when subfolder selected
Fixed bug where singleton PARC inputs
not running
Fix for aggregation breaking on large
rasters
Added support for coordinatate systems that go from 0-360
instead of -180 to 180.
It remains to be seen how generally robust this is though.
Fixes JIRA 213.

Added a check for empty folders instead of just
file size == 0 in the check for good previous runs
Fixes JIRA 215.

User named inputs that don't follow SAHM
naming conventions no longer break a workflow
Minor changes to check before overwriting files
Fixed bug in raster reclassifier
minor bug
merge with latest master 1.2