Finish most of code port from epics module
Ported all pertinent files from epics-module to here. Changed all asynStatus usage to rmmStatus. Added rmmError to rmmStatus. Changed all methods from snake_case to camelCase.
Ported all pertinent files from epics-module to here. Changed all asynStatus usage to rmmStatus. Added rmmError to rmmStatus. Changed all methods from snake_case to camelCase.