Merge pull request #172 from khogenso/devel

Last of the warnings (on gcc 4.1.2 with -Wall anyway) gone - some bugs fixed as a result
Merge pull request #174 from khogenso/devel

Splitting out libasf_metadata, warning fixes
Merge branch 'devel' of https://github.com/asfadmin/ASF_MapReady into devel
Made fit_warp available as a library function
Add fit_warp to the list of MapReady tools
Added a clean target to fit_warp Makefile
Need the XML libs in the GUI, now.