Use latest source column values (not published) to recompute column
Factor out recompute logic to a helper
Refactor so we don't directly reference PG store in the Resource classes
Merge branch 'master' into urmilan/compute-column-on-add
Split out response logic for upsert so that APIs that do export+compute can return their its own response
Invoke computation handler on a computed column at creation time
Merge branch 'master' into urmilan/compute-column-on-add

Conflicts:
	soda-fountain-lib/src/main/scala/com/socrata/soda/server/resources/Resource.scala
Organise usings
Merge pull request #33 from socrata/urmilan/compute-column-on-add

When adding a computed column, compute values for existing rows