ADD_APPEND_ARGS Adding capability of play apps to take extra args
ADD_APPEND_ARGS Moving type checking to the rest layer for now
ADD_APPEND_ARGS A few cleanups
ADD_APPEND_ARGS Some changes post review. smserver now trows exception if append args are passed to non supporting service type and cleaner get or else stye is used for setting append args
ADD_APPEND_ARGS Changing warning to error
Merge pull request #15 from hmrc/ADD_APPEND_ARGS

ADD_APPEND_ARGS Adding capability of play apps to take extra args. Merging post review