add storehaus-algebra dependency
upgrade to shapeless 2.0.0 and externalize scalding-storehaus to cut down on build version 2.10.x
Re-add sources into scalding-commons and exclude storehaus explicitly in Build.scala for 2.9.3
Merge pull request #1 from AndreasPetter/0.11.3rc1-storehaus-cassandra-split-up-scalding-storehaus

0.11.3rc1 storehaus cassandra split up scalding storehaus