* Add error handler that converts from rpc.Status errors to Watchtower API errors.
* Better testing for ErrorHandler.
* Rename testcase and remove empty default switch case.
* Change the error status back to int64.
* Converting everything to int32s.
jsonpb wraps int64s as a string which we dont like. We'll figure out how to use values larger than int64s when it comes up.
* Remove special casing for TraceId which isn't needed anymore.
* Removing wrappers from error details since we never need to know when they are set or unset from the end user.
* Using the helper error functions inside the project service.
* Correct usage of hclog, replace panic with Error log.
* Adding periods to all API returned errors, correct spelling, fix missed invalid argument error not using helper function.
* Change our logged errors to Error instead of Warn.
* Add TODO for defining and using our own defined API error codes.
* Add TODO to remove internal error messages.
Jeff Mitchell
Todd Knight