README.rdoc in delta_force-0.0.1 vs README.rdoc in delta_force-0.0.2

@@ -2,10 +2,12 @@
 
 DeltaForce allows you to use some Postgres 8.4+ window functions in named scopes on your ActiveRecord models.
 
 It is very much still a work in progress; please contribute if possible and let me know what I can do better!
 
+{<img src="https://travis-ci.org/joelind/delta_force.png" />}[http://travis-ci.org/joelind/delta_force]
+
 == Installing
 
 <b>DeltaForce only works with Rails 2.3</b>. I will be adding Rails 3 compatibility shortly.
 
 In your Gemfile:
@@ -67,14 +69,22 @@
   Foo.changes_in_x_and_y_and_z_by_bar_id_over_period.first.closing_period
    => "2011-03-11"
 
 Note that opening_* and closing_* values are not currently typecast.  I'd like to support that in the future.
 
+
+You can also retrieve a hash of the values for a given field *as of* the period as follows:
+
+  Foo.x_by_bar_id_as_of_period("2011-03-10")
+  => {1=>2.0, 2=>4.0}
+
+This hash contains the latest x on or before the specified period keyed by the bar_id.
+
 == Under the hood
 
 DeltaForce uses {Postgres 8.4+ window functions}[http://www.postgresql.org/docs/current/static/tutorial-window.html] to partition data by an arbitrary key.
 
-This has been tested agains Postgres 8.4 and should also work with Postgres 9.  Oracle provides the same set of functions, but I have not been able to test it against an Oracle instance yet.
+This has been tested against Postgres 8.4 and should also work with Postgres 9.  Oracle provides the same set of functions, but I have not been able to test it against an Oracle instance yet.
 
 == Copyright
 
 Copyright (c) 2011 {Joe Lind}[http://github.com/joelind]. See LICENSE for details.