Merge pull request #145 from asfadmin/devel

Preparing for 3.2.1
Merge branch 'devel'
Merge branch 'master' of https://github.com/asfadmin/ASF_MapReady
Merge pull request #153 from asfadmin/devel

Preparing for test delivery
Merge pull request #156 from asfadmin/devel

New tool clm
Merge pull request #6 from asfadmin/master

Pull latest changes
Merge pull request #180 from khogenso/devel

So-called "smart" way of indicating unused variables
Merge pull request #181 from rudigens/master

Pull latest changes
Add 6 SConscripts.
Merge pull request #182 from asfadmin/jsn

Add 6 SConscripts.
Merge pull request #8 from asfadmin/devel

Devel
Massive scons refactoring.

Several major changes to the scons build system. 1. No more ugly LIBPATH lines in the SConscripts. 2. Better options to the ld linker allows scons to properly recognize higher-order dependencies. Now each SConscript only has the first-order dependencies for that particular job, and no others. This eliminates about 75% of the dependencies in the whole project. 3. The --as-needed option to ld only links an executable to the symbols it needs, even if more are given on the command line.
Merge pull request #183 from asfadmin/jsn

Massive scons refactoring.
Add every remaining SConscript.
Add global RPATH to all linked objects.
Merge pull request #184 from asfadmin/jsn

Add every remaining SConscript.
Merge pull request #9 from asfadmin/devel

Pull latest changes
Rename asf_convert_gui to mapready and asf_convert to asf_mapready.
More renamings for mapready and asf_mapready.
Get rid of unnecessary references to the scons global environment.

Also update SConscripts for mapready and asf_mapready to reflect the renaming.