Squashed improvement of spawn/minion handling when a minion's disk fills up.
Merge pull request #86 from addthis/minion_full

Squashed improvement of spawn/minion handling when a minion's disk fills up
fix conditions that lead to NaN and persisted NaN corruption of values
make queueattempt limit a parameter
Add setting to allow for more aggressive HostFailWorker rebalancing.
Another minor fix for fs-okay host failure.
Merge pull request #87 from stewartoallen/at-pull-fix-sum-nan

fix conditions that lead to NaN and persisted NaN corruption of values
Fix up path-query job failures.
catch Throwable instead to prevent Errors from causing lockups in shutdown
Merge pull request #89 from stewartoallen/at-pull-catch-throwable-in-task-runner

catch Throwable instead to prevent Errors from causing lockups in shutdown
Fix failing-minion state display
increasing logging level for exceptions during task feeder; removed some unused imports
query channel server is dead
merge query channel server deletion changes

Conflicts:
	hydra-main/src/main/java/com/addthis/hydra/query/util/QueryChannelUtil.java
	hydra-main/src/main/java/com/addthis/hydra/query/web/QueryServer.java