A good example is CryptoCompare - it has many methods that are specific to itself (for example, get_historical_hour or get_info. The latter is surprising, but I could not find it on brave new coin.
What we need to do is discuss what specific methods we need (see #35) and move those to the base.
For methods specific, we should add the feed/exchange name as a prefix. For example, cryptocompare_get_info. The trick would come in when we want to run this on the cli. So running coin -f cryptocompare info would run cryptocompare_get_info, and coin -f bravenewcoin xyz would run bravenewcoin_get_xyz