Added market up and down for votes
Updated votes to use market structure
Merge pull request #78 from Neamar/votes

Votes with markets
Importing from EngineTestCase
Test first and last effects on manhattan
Merge branch 'v2' of github.com:Neamar/corporate into v2
Merge branch 'v2' of github.com:Neamar/corporate into crash

Conflicts:
	engine_modules/corporation/tests/test_models.py