v0.8.0

Enhancements

• Allow changesets to be merged with Ecto.Changeset.merge/2
• Add Ecto.Changeset.put_new_change/3
• Support the :using option for indexes in Postgres
• Support adding/dropping indexes concurrently with Postgres
• Allow expressions to be given as default when adding columns via fragment/1
• Support integer casting on float types
• Explicitly checks if adapter supports ddl transactions
• Log query parameters (this means custom log functions should now expect another element in the query tuple)

Bug fixes

• Only drop existing indexes when reversing create index
• Allow boolean literals as defaults when adding columns
• Add default size to migrations for string columns

Backwards incompatible changes

• uuid() and <<>> syntax in queries has been removed in favor of explicit parameters
• lock expressions now must be a literal string