postgresql_fts 7.x-1.0-alpha1

First releas containing the following features:

- Create and maintain PostgreSQL FTS indexes (also called field indexes)
- Indexes are based on columns and instance combinations
- Indexes maintain themselves (act on CRUD actions of field data)
- Basic Views integration (full text search filter handler per index) via shipped PostgreSQL FTS Views module

I consider this module to be in its infancy stage and want to model it further based on real world usage. No API functions are available yet (besides a pair of module hooks that fire after insertion or deletion of an index), which might be a desire towards the future if folks like to work with the lexeme data stored using contribution modules. Yet, I wish to see which direction this module takes before introducing possible bloat.

Please let me know all your ideas / features / worries via the issue queue.