Added call back to model upload.
Changed FstReader name to ModelUploader
Changed FstReader name to ModelUploader
Merge branch 'error_or_success_model_upload_msg' of https://github.com/Atlante45/hifi into error_or_success_model_upload_msg
Merge pull request #2601 from Atlante45/error_or_success_model_upload_msg

Error or success model upload msg