Updating exiftool mapping
Added read check to files and directories before trying to traverse them
bug fixes to MIX schema conversion
better checking of file permissions before processing
improved status and error messages when running against a directory
updating null file check
updated build
Merge branch 'master' of https://github.com/harvard-lts/fits.git

Conflicts:
	lib/fits.jar
updated build
more error checking when iterating over directories
Merge branch 'master' of github.com:harvard-lts/fits