rpm: add fifo support
Fix gem command conflict with specific_install

When specific_install is installed, calling "gem spec" is ambiguous and
fails.  Call it with the full name "gem specification" instead to avoid
that.
Merge pull request #533 from petere/gem-spec-conflict

Fix gem command conflict with specific_install
add deb-use-file-permissions
Merge remote-tracking branch 'upstream/master' into deb_use_file_permissions
Merge branch 'deb_use_file_permissions'
- Write json from get_metadata to a file and read that. stdout and
stderr are regularly abused by python setup.py's (like numpy, for
example) so we can't easily pull out the json from stdout anymore.
.
Merge remote-tracking branch 'upstream/master'