Add .filter to KeyedListLike
add filterKeys
make sure to push filterKeys mapside
Use thread context classloader so that com.twitter.scalding.Tool can be used without fat jars
Merge pull request #752 from themodernlife/develop

Use thread context classloader when creating Jobs via reflection
Update serliazer to use the same class loading logic
Merge pull request #753 from themodernlife/develop

Make sure Kryo instantiator uses the thread context class loader
Re-add mapValues to IdentityReduce
Merge pull request #754 from twitter/mapValues-grouped

Re-add mapValues to IdentityReduce
Fix typo
Don't use a bad 2.10 version
Merge pull request #748 from twitter/filterMethods

Add .filter to KeyedListLike
"Require" sources in JobTests to have a mock buffer.

This is just adding an error message to inform users writing JobTests that they need to
provide buffers for every source used in the job.
Merge pull request #759 from daisyzhou/develop

"Require" sources in JobTests to have a mock buffer.
Merge pull request #756 from twitter/fix210ver

Don't use a bad 2.10 version
Resolve merge conflict