Merge pull request #1 from teddythetwig/master

TradeAPI
Renaming key file; renaming string function; some reformatting.
Adding the gemspec.
Building gem.
added sample btcapi.yml
Adding basic validation of the server json and adding a spec.
Adding basic examples for valid_json?
Adding an ignore for emacs temp files.
Adding the PublicOperation and Fee classes.
Implementing the Ticker class.
Implementing the Trade and Trades classes.
Adding a contributors file.
Formatting
Formatting
Formatting
Formatting
Adding more headers to the doc.
Building gem.
something
merge