Fixes from static analysis
Minor changes

Pending changes on Randy.
Parses destination in constructor
Beautiful exceptions everywhere
New exitcode 4 from new_job (JobAlreadyExists)
Merge branch 'master' into 'vistrails'
Work on VisTrails package
Makes RemoteQueue#status() return the status
Exports useful symbols from 'tej'
Merge branch 'master' into 'vistrails'
Work on VisTrails package