Ignoring IDE generated files
Changed dummy service to be the TransactionsEngine.

The first story to be implemented will list
transactions for a single user.
Renaming the dummy service project directory.
Ignoring IDE bin/ directory
Fixing JSON syntax for dummy service
Setting up rspec
Setting up webmock
Frontend /transactions requests tx list from backend.

It will be consumed from Javascript.

(Not the Sinatra application is not directly tested.
This might change if it becomes more complex.)