Add fork
set cascading framework property
Add avro support into Scalding as a module.
Add a package object, move some typed stuff to dir

This should be a no-op functionally (complain if you see anything
other than moving code or changing imports)
set the cascading framework system property instead of using the API, since the API has side effects.
Merge pull request #519 from fs111/develop

set cascading framework property correctly
Merge branch 'develop' of https://github.com/twitter/scalding into scalding-avro-module
Keeping up to date with develop branch
Merge pull request #523 from twitter/package-obj

Add a package object, move some typed stuff to dir
Fixed 2.10 issue with HadoopSchemeInstance (doesn't work with AvroSource somehow)
Merge pull request #514 from twitter/typedFork

Add fork
Fixed helper functions, added license info and README.
Added some better apply functions in UnpackedAvroSource per Oscar's suggestion.
Merge pull request #525 from ccsevers/scalding-avro-module

New module for Avro support