Refactored futupayment config module
Migration support python > 3
Updating README and gitignore
Added example app
Added simple tests travis and tox
Merchant ID is string (CharField)
Cleanup (for travis)
Fixs travis conf
Excluded non supported env and added bungle to readme
Fixed python 3.x b64encoding
Added custom Signal
Merge branch 'master' of github.com:Futubank/django-futupayments into krukov/config-refactoring

Conflicts:
	futupayments/models.py
Resolve conflicts
Adding migrations to setup.py
Fix signature calc
Get version method for setup and form data
-- 'south' from example
Refactor signal args and sending
Fixed  'is None' problem and save payment anyway
Tests for callback view and fix response