Merge branch 'release/0.8.5'
Add MultipleTsvFiles input source.

Allows you to specify an array of file paths that have the
correct Tsv schema. Includes a new test case for this source.
Project on fields before groupBy.
Really do the optimization.
Init with groupFields. Handle scanLeft and sortBy.
Don't use multiple parameter declarations

Pass in a Sequence of paths instead of varargs so that we can have
a single parameter list
Remove isBuferrUsed.
Merge pull request #475 from twitter/klin_speed_groupby

Project on input fields before groupBy.
Merge pull request #460 from rweald/add_multiple_tsv_input_path_source

Add MultipleTsvFiles input source.
Re-throw the exception in Tool.
Change extraInfo to val.
Merge pull request #487 from twitter/klin_fix_tool

Re-throw the exception in Tool.
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.
Merge branch 'before_meatlocker' into feat-eval-tool
allow jobconf to be passed in to jobtest
refactor scalding-eval project to separate the runtime evaluation from the tool subclass