Added tornado to test requirements in setup.py
Added Travis config
Add 2to3 support for py2 compatibility
Remove py2 :)
Update README.md
Merge remote-tracking branch 'upstream/python3' into python3

Conflicts:
	setup.py
Fixed missing Decimal._exp in pika/data.py; added tornado and twisted for test requirements; skipped two randomly failing tests which relied on undefined sort order
Merge pull request #2 from C-Pro/python3

Fixed error with missing Decimal._exp in py3k