RQ connectivity implemented to EC2 instance.

roaster.py has function definitions for roaster.py in
github.com/expresso-math/roaster/ so that it plays nicely with RQ. Added
test python file to play around with RQ.
Added EC2 info, updated pip requirements.txt
Merge branch 'master' of github.com:expresso-math/barista

Conflicts:
	requirements.txt