Refactoring
Added cucumber and directories for it
setup cucumber world for more convenient specs
Removed specs for trading from instrument (will rewrite)
Create a new order feature spec
Added examples for order and implemented first one
Added rspec config
Refactored authorization from instrument spec into shared example
Implemented authorization for Order.buy
Refactoring
Added spec for using/retrieving correct url
No more stubbing configuration of Oanda module
Order now passes
Order now uses the correct units
Order now uses the correct instrument
Uses the correct type now
Added spec for side
Removed #buy on instrument
Corrected stubs from WebMock and implemented correct order returning
Implemented correct side handling