added gembuilder, cleaned up pep8
Merge pull request #56 from maxamillion/dev/maxamillion/gem_builder

Added tito.builder.GemBuilder - Round 2
Automatic commit of package [tito] release [0.4.10-1].
add a --scratch option for KojiReleaser

Add a command-line option of --scratch to perform a scratch
build in Koji.  This is easier to use than always setting
the environment variable of SCRATCH=1.
Merge pull request #58 from aronparsons/koji-scratch

add a --scratch option for KojiReleaser
Automatic commit of package [tito] release [0.4.11-1].