Implements a job manager based on Groovy

Using Terracotta JobStore
Construct a CustomJob class
Process watching directory var/job and proceed .job file, .trg file
By now:
- Schedule in .trg file doesn't matter. default 10s interval. But
schedule=delete could delete job from scheduler.
- job's name and job file's name must be the same
- Update job effect immediately
- Update .trg file effect perfectly
- Config information is hard-code in Terracotta_Prototype.groovy