Remove custom predicate stuff from the README. Will move it out to a wiki page

README.md

@@ -15,27 +15,11 @@ for Ransack (or MetaSearch, for that matter). Try
 In your Gemfile:
 
     gem "ransack"  # Last officially released gem
-    # gem "ransack", :git => "git://github.com/ernie/ransack.git" # Track git repo
 
-If you'd like to add your own custom Ransack predicates:
+Or if you want to use the bleeding edge:
+
+    gem "ransack", :git => "git://github.com/ernie/ransack.git" # Track git repo
 
-    Ransack.configure do |config|
-      config.add_predicate 'equals_diddly', # Name your predicate
-                           # What non-compound ARel predicate will it use? (eq, matches, etc)
-                           :arel_predicate => 'eq',
-                           # Format incoming values as you see fit. (Default: Don't do formatting)
-                           :formatter => proc {|v| "#{v}-diddly"},
-                           # Validate a value. An "invalid" value won't be used in a search.
-                           # Below is default.
-                           :validator => proc {|v| v.present?},
-                           # Should compounds be created? Will use the compound (any/all) version
-                           # of the arel_predicate to create a corresponding any/all version of
-                           # your predicate. (Default: true)
-                           :compounds => true,
-                           # Force a specific column type for type-casting of supplied values.
-                           # (Default: use type from DB column)
-                           :type => :string
-    end
 
 ## Usage