Merge pull request #293 from khogenso/devel

New front end for Rudi's kernel filtering; fftMatchProj -list enhancements
Merge pull request #294 from khogenso/devel

Support for more kernel types that we may want to use
Merge pull request #295 from khogenso/devel

kernel: Added hooks for the speckle filter GAMMA_MAP
Had to extend the projection calculation to work properly for subsets.
Merge pull request #88 from rudigens/rtc

Had to extend the projection calculation to work properly for subsets.
Merge pull request #89 from asfadmin/devel

Pull latest changes
Merge pull request #90 from rudigens/master

Pull latest changes
Merge pull request #296 from rudigens/master

Fix for FFT matching subsets
Found a little problem with writing to output files.
Merge pull request #297 from rudigens/rtc

Fix for fftMatchProj
scons support for asf_logscale