first pass at threadless router support
fix import
port and address are no longer needed
don't call super configure; override start() as it will never return
first pass at new-routing support based of threadless branch
use actual client..
start update to 0.13+ compat
update comment in view
update install instructions
depends on twilio
fix callback functionality
link to status callback docs
update license date
update gitignore
add tox
ignore egg file
add travis config
Merge branch 'develop' into feature/new-routing

Conflicts:
	README.rst
	rtwilio/backend.py
Merge pull request #5 from caktus/feature/new-routing

Support for RapidSMS 0.13+