Merge pull request #35 from achbed/dev

Stability fixes
Added new QueueLogger class (logging from a queue so we can do thread-safe logging)
Moved core and station to new common log functions (_info and _err) using new QueueLogger
Core now attempts to restart stations that stop
Core now detects new folders on the fly instead of only at start time (stationfolder option)
Station.py has a lot of changes to utilize the common blocking queue only when needed rather than at every step (may increase performance with many stations)

TODO:
Detect proper vs unexpected shutdown of stations and restart only unexpected ones
Make new folder detection for stationfolder an option
Merge remote-tracking branch 'remotes/upstream/dev' into dev