test-install doesn't work for OS X and seems unnecessary anyway

Change-Id: If0623589ae064f7a038f3761ab7b50528ac521d6
unopkg is not signed either, for some reason

Change-Id: I820214f4c248b4f3483a72998ead75aaa1e280ed
Turn eventual spaces in the app bundle name into dashes in its codesigning id

Change-Id: Ibf643da61ce7fffb9bc8e704914afb5985be8f6a
Collabora branding

Change-Id: I6044c9aeba8b7f3a58b0465b2944275bb5aee6bb