Fix a bug in determining whether a task is async
add support for ganglia host spoofing
[cassandra] Rename timestamp -> ts.
Merge pull request #201 from asher/ganglia-spoof

add support for ganglia host spoofing
Merge pull request #199 from mbautin/fix_async_task

Fix a bug in determining whether a task is async
Improved `chronos-sync.rb`.
Sort offers by slave load hint.
Implemented replacement web UI.
Bump mesos version.
Added separate button to create new dependent job.
Removed edit/new job functionality from UI.
Dropped duplicate button.
[zookeeper] Migrate ZK duties to Curator

[zookeeper] Finish migration to Curator and add tests

[zookeeper] Fix borked rebase
Fix for dependency invocation handling, tests.

This fixes 2 things:
 - don't try to restore invocation counts from ZK state (as they may be
   wrong due to missed status updates).
 - reset the invocation counts any time a dependent job starts.

Also added more tests around dependencies.