Adding catches for DirectoryNotFoundException's.
Move submodules into /submodules
Update references to libwebp-net project
Update documentation generator path
Update build script to handle new studiojs, libwebp-net, and lightresize locations. Fix long-standing bug in 'allbinaries' packaging related to duplicate files when flattening a directory structure during archive creation.
Merge branch 'origin/reorg-submodules'

Conflicts:
	submodules/libwebp-net
	submodules/studiojs