crest-cassia/oacis — pull request #191 by takeshi-uchitane (2014-04-25 10:28:31+00:00)
Title: Pause job submission and observation

Fixed #128

### Specifiication
- host has 'status' field
- status field is either enable or disable
- status disable means that the host does not submit and include any jobs
- update host view
- host status is editable
- separate 'host status' to 'job status' and 'scheduler status'
Note
- restart worker before try to change host status.