Merge pull request #170 from khogenso/devel

Cleaned up the tile-based FFT matching code - now available to users
Add src/trim to scons build.
Clean up commented lines in trim SConscript.
Add src/make_overlay to scons build.
Merge pull request #171 from asfadmin/jsn

Add SConscripts.
Two more SConscripts.
Merge pull request #173 from asfadmin/jsn

Two more SConscripts.
New "outline" feature in asf_view, shows outlines of other loaded images.
Merge branch 'devel' of github.com:khogenso/ASF_MapReady into devel
Merge branch 'devel' of github.com:asfadmin/ASF_MapReady into devel