Sphinx service completion

The following changes were made:

-Sphinx is successfully transcribing wav files
-Successfully started Sphinx as a background service after the completion of the conversion to a wav file
-SphinxTranscriptionService is successfully saving a text file to the external recordings directory.
-Filebrowser is only showing the name (without extension) of the wav files. We can get the corresponding text files with the same name and extension .txt
-Mediaplayer is populating the associated transcriptions.