Gerrit build logs are not always compressed

Code had made the assumption that Gerrit's build logs were always
compressed. Turns out this is not the case. So, take alook to see
what the directory actually has for a build log.
Merge pull request #12 from craigtracey/buildlog

Gerrit build logs are not always compressed
Support additional log levels

We should support a debug mode. So, first make all logs go to same
logger - not loggers named by their module. Then add a -d flag to the
shell arguments. And finally, start to differentiate log levels in the
code itself.
Fix incorrect function call

Errantly called this as set_debug instead of set_level_debug.
Update the README with additional info

Need to provide some background about how this works, why we built it,
what it currently supports, and what is still to be done.
Merge pull request #13 from craigtracey/morelogging

Support additional log levels
Merge pull request #15 from craigtracey/README

Update the README with additional info
Fix links in README

Had the markdown syntax backwards
Add missing package.py

This file was intended to be part of the incremental change merged
earlier today.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	giftwrap/builder.py
	giftwrap/openstack_git_repo.py
	giftwrap/tests/test_log.py