Merge branch 'hotfix/fix_missing_mpeg_error_message' into develop

* hotfix/fix_missing_mpeg_error_message:
  Fixes issue #5
Merge branch 'hotfix/use_fallback_picture' into develop

* hotfix/use_fallback_picture:
  Better formating of the error message during recorder._add_logo()
add_show() and add_station() log with debug priority.
Introduced config.tempfile

It is used to define loctaion of interim files. While capturing the audio
stream the buffered file is written to  the folder specified in config.tempfile
(defaults to return value of tempfile.gettempdir()).

The location of "tempdir" can be overriden by a setting in the config file.
Merge branch 'hotfix/custom_tempdir'

* hotfix/custom_tempdir:
  Introduced config.tempfile
  add_show() and add_station() log with debug priority.
Merge branch 'hotfix/custom_tempdir' into develop

* hotfix/custom_tempdir:
  Introduced config.tempfile
  add_show() and add_station() log with debug priority.
  Remove temprary file also if the recording didn't succeed.
Merge branch 'develop'

* develop: