USD/PPC corrected to PPC/USD

"The quotation EUR/USD 1.2500 means that one euro is exchanged for
1.2500 US dollars. Here, EUR is the base currency and USD is the counter
currency."
http://en.wikipedia.org/wiki/Currency_pair

This ticker is from: https://btc-e.com/exchange/ppc_usd

You can see the same format here:
http://finance.yahoo.com/q?s=BTCUSD=X
http://www.google.com/finance?q=CURRENCY:BTC
Added some more exchanges

Added AllCoin, ANXPRO, Anycoin Direct, BTER, Cryptonit, LiteBit and
ShapeShift. Also deleted BitTrex.
Another batch of exchanges added

Added AllCrypt, Atomic Trade, Bitspark, Bleutrade, BX Thailand,
Coinbroker, CoinMkt, Coins-E, Comkort, Crypto-Trade, NIX-E, Poloniex,
SWISSCEX and Vircurex.
Another exchange added

Added HolyTransaction
One more exchange added

Added Excoin
Merge pull request #185 from sandakersmann/master

Added new exchanges and removed BitTrex.