Arch-Perl

This is mostly a maintenance release. It solves the problem of tests failing when no tla is installed and features several small improvements.

Arch-perl can now take advantage of bazaar's
caching functionality when retrieving changesets
and commit logs. The annotate function can list
revisions that don't contribute to the file
anymore. Missing documentation and a few more test
cases have been added. The internal managing of
arch sub-processes has been simplified. Support
for baz-1.4.2 and tla-1.3.3 was added.

Arch-perl can now generate file annotations and
syntax highlighting. Support for baz-1.2, baz-1.3,
tla-1.3, and tla-1.3.1 has been added. New
frameworks for running the arch backend
asynchronously and implementing regression tests
have been started. Various smaller improvements
were made all over the place.

This release adds support for baz, another arch backend alternative to tla.

Improved documentation and some bugfixes, mostly concerning file history.