NOTE && TODO:  This has been tested on Rails 2.0.2 only.
It contains some activesupport'isms, and... they should definitely be
stripped out and this plugin made into a proper gem.


Description
==============
  This is an extremely light weight interface to postgresql 8.3's built
  in text searching.  There exists an acts_as_tsearch, but this is its
  smaller and built specifically for 8.3, more pointed, brother.
  It lacks many features, but is useful in most text searching scenerios.

  This plugin assumes a lot.  The lot is:
    - Configuration is default, most likely pg_catalog.simple, unless
      init chooses another lc_ctype
    - GIN index by default.  You can pass in :index => 'GIST' if you'd like to change that.
    - Default tsvector is a coellesced composite of the fields you pass in.


Usage
==============
  - ensure your table has a tsvector ts_index column
    ... in create table block:  t.tsvector :ts_index

  - ensure your model declares text_searchable properly
    ... text_searchable :fields => [:name, :description]

  - YourModel.find_by_text_search("moose OR mousse")
    ... returns result set.  supports most googlish ands and ors and double quoting
    ... supports WillPaginate pagination, and the will_paginate view helper

  - YourModel.count_by_text_search("moose OR mousse")
    ... returns the number of matches


Todo
==============
most importantly... document, and turn it into a gem

also.... weighting, highlighting, optional native triggers,
custom parsers/templates/rankers, custom config with 2 parameter tsvector,
multiple vectors, multitable support