get cron settings from settings.py/local_settings.py; make sure to use same executable to run cron as cronserver was run.
Merge remote-tracking branch 'jamalex/require_admin_account_at_install' into configurable_cron
initial checkin to launch cron async from the django server
Merge branch 'configurable_cron' into remove_cronserver
Merge branch 'sync_warnings' into remove_cronserver
now force cron to run immediately on video/subtitle download (and other commands, except securesync)
Code cleanup
more robust subprocess launching.
Merge remote-tracking branch 'upstream/develop' into configurable_cron
commenting changes
Merge pull request #201 from bcipolli/configurable_cron

Cronserver updates
Merge remote-tracking branch 'upstream/develop' into topictree_id_workaround