Implemented getTrades for MtGox
Fix logging
Merge branch 'master' into mtgox

Conflicts:
	mexbtcapi/concepts/market.py
Merge branch 'master' into mtgox
Converting MtGox depth to concepts.market.Order
PEP8'ing
Fixing Ticker
Merge pull request #15 from StevenLooman/mtgox

(by StevenLooman) Mtgox Market implementation changes, logging changes
logging.Logger on all important hierarchy levels
proper concepts.currency __str__ methods, docstrings
Implemented ActiveParticipant for MtGox.
Making Order.is_buy_order/.is_sell_order more robust.
Merge branch 'mtgox_participant' of https://github.com/StevenLooman/mexbtcapi into StevenLooman-mtgox_participant

Conflicts:
	mexbtcapi/api/mtgox/__init__.py
concepts.market.ActiveParticipant: reorder methods for readability
concepts.Participant: bad parent class
consistent super() usage
concepts.market.ActiveParticipant.placeAsk/BidOrder -> placeOrder
concepts.currency.ExchangeRate refactor, more methods, functionality
concepts.Market._orderSanityCheck
api.mtgox.http_v1.high_level: forgot to change this in commit 68cfe2ca454d25f5cd37f8c3579868f68320cd28