Database migration to add computation strategies to sodafountain DB
Basic data model for column computation strategy (not yet hooked up to column objects)
Represent geo columns as WKT when exporting to CSV
Parse computation strategy from schema definition; include computed field in computation strategy
Turn computation strategy type into an enum
Make computation strategy sourceColumns and parameters optional to be consistent with DB
Make source_columns column a text array; remove char limit on parameters column
Read computation strategy out of Postgres
Fix/resurrect commented out Postgres store tests
Cleanup Postgres store test
Store computation strategy data in sodafountain DB
Add computation strategy to ColumnSpec
Support different migration commands in run_migrations.sh
Merge pull request #3 from socrata/urmilan/geo-wkt-export

Represent geo columns as WKT when exporting to CSV
Addressed CR comments; fix code smells related to deprecated org.scalatest.matchers.MustMatchers
Merge branch 'master' into urmilan/computed-columns-db
Address CR comments
Prep for compute during upsert: make RowDAOImpl able to tell when a column is computed and prevent manual edits to that column
Workaround for Postgres JDBC4 issue affecting array columns
Make workaround less verbose