Implemented Nerubian Egg
Fix for Nerubian Egg to make it copyable
Added this week's Naxxramas cards to cards.csv
Implemented Maexxna,

Also worked on copying some hunter cards, but no tests yet.
Copying tests for Maexxna and Emperor Cobra
Updated readme.md to reflect current implementation.
Bugfix for Emperor Cobra where silence then copy would result in the copy still having the effect.
Flake8 Fix and update for readme.md
Flake8 Fix and update for readme.md
Changes to Minion to make silencing of health and attack changes copyable
Made Bestial Wrath copyable.

 Working towards #29
Merge branch 'master' of https://github.com/danielyule/hearthstone-simulator