-Use boost program_options isntead of tclap for command line parsing
-Removed tclap dependency entirely, now building on windows again
-Ignore unknown command line arguments while parsing
Merge pull request #64 from eile/master

Cleanups
CR #63
Merge branch 'removeTCLAP' of https://github.com/VMML/Collage into tclap
Manually apply Ignore unknown command line arguments while parsing
Merge branch 'master' of https://github.com/Eyescale/Collage into tclap