Expand doc files list / matchers
Add Gem#file_name helper
Update metadata during distgit update process
Prefix %gem_instdir to non-special files in String#rpmize

Few additional style changes / cleanups to rpmize / unrpmize
Merge pull request #94 from ManageIQ/rpmize_prefix

Prefix %gem_instdir to non-special files in String#rpmize
Merge pull request #97 from ManageIQ/distgit_metadata

Update metadata during distgit update process
Merge pull request #95 from ManageIQ/file_name

Add Gem#file_name helper
Merge pull request #96 from ManageIQ/doc_files

Expand doc files list / matchers
Fix #37: raise errors on build failures