Implemented Fen Creeper, Cleaned Up

Fixed CamelCase
Implemented Venture Co Mercenary

Made silence battlecries consistent
Merge branch 'master' of https://github.com/danielyule/hearthstone-simulator

Conflicts:
	cards.csv
	tests/card_tests/neutral_tests.py
Added tests for Warlock

Fixed Mortal Coil as well
Rest of Warlock Tests

Fixed most warlock spells, more CamelCase, not sure about flake8 or
formatting
Merged changes from randomflyingtaco and fixed some formatting issues
Formatting fixes
Merge branch 'randomflyingtaco-master'