Updated the ReviewBot ToolResource. 

Previously the ToolResource would not correctly update changes made to any

ReviewBot Tools. The previous behavior would allow a ReviewBot tool to be 

updated only if there is a change in name/version. However, during 

development this can be frustrating, since options are being frequently 

revised. To fix this problem, I have changed resource to update the 

instance of the tool in the database. This is done regardless of a change

in versioning. This makes the process of creating tools easier, since tool

settings made in the tool are updated each time that the ToolResource 

create method is called.

This is difficult to do since there is no test framework setup for 

ReviewBot. No real tests were done, only manual testing and a quick

visual inspection.