Merge branch 'release/0.8.5'
meatlocker
Re-throw all exceptions in Tool.
Merge pull request #490 from twitter/klin_fix_tool_run

Re-throw all exceptions in Tool.
Change version number to 0.8.6.
Bumping version numbers.
Bumping version numbers.
Adds serializers for Field
Fix an bug introduced in the previous commit
Merge pull request #485 from twitter/add_meatlocker

Meatlocker all ops in Operations.scala