- Fully clean up temporary stream files for all red5 webapps.
- Also clean up temporary stream files for kurento recordings.
- Add a new, separate variable for controlling maximum time to keep
  log files.
- Clean up old (rotated) log files for red5, tomcat, recording which
  were accumulating.

Some of the stuff has gotten moved around in the 1.1 dev process.

This way, the raw files for recordings without marks will still be deleted,
but it will be after a delay - by default, 5 days, the same as other
temporary files. This gives someone the ability to manually force the
recording to be processed by using bbb-record --rebuild

If the recording is processed by bbb-record --rebuild, it is no longer
eligible for this automatic deletion (raw files will be kept)

Updated the cron.daily job for bigbluebutton to delete .pfb and .afm files generated by ghostscript from the /tmp directory.

Disable the cron.daily job for now.  We don't want to delete the source files for recordings here; rather, in the rap-worker.rb

Added cron.daily job to remove presentations older than 11 days, and remove recordings for desktop sharing and webcams (if present)