Add BrandingThemes endpoint
Use the new readme location in setup.py
Less code is better (use python's "with" in setup.py)
Added Travis CI configuration.
Added actual content to the Travis CI config.
More tweaks to Travis CI config.
Add Travis CI build status image to README.md
Merge remote-tracking branch 'upstream/master'

Conflicts:
	setup.py
	xero/api.py