Needed for sardana issue 102. Adding loggingtofile to logger
The implemention of a new logging for sardana (sardana-org/sardana#102 (closed)) requires this change in taurus. A new method (loggingtofile) is added to the Logger.
The implemention of a new logging for sardana (sardana-org/sardana#102 (closed)) requires this change in taurus. A new method (loggingtofile) is added to the Logger.