Adding a README file.

README.markdown

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+# activerecord-import
+
+activerecord-import is a library for bulk inserting data using ActiveRecord. By default with ActiveRecord, in order to insert multiple records you have to perform individual save operations on each model, like so:
+
+    10.times do |i|
+      Book.create! :name => "book #{i}"
+    end
+    
+This may work fine if all you have is 10 records, but if you have hundreds, thousands, or millions of records it can turn into a nightmare. This is where activerecord-import comes into play. Here's the equivalent behaviour using the #import method:
+
+    books = []
+    10.times{ |i| books << Book.new(:name => "book #{i}") }
+    Book.import books
+    
+Pretty slick, eh? 
+
+Maybe, just maybe you're thinking, why do I have do instantiate ActiveRecord objects? Will that perform validations? What if I don't want validations? What if I want to take advantage of features like MySQL's on duplicate key update? Well, activerecord-import handles all of these cases and more! 
+
+For more documentation on the matter you can refer to two places:
+
+1. activerecord-import github wiki: http://wiki.github.com/zdennis/activerecord-import/
+1. the tests in the code base
+
+Note: the tests have been updated since the previous version of ar-extensions to provide better readability and easier maintenance.
+
+# LICENSE
+
+This is licensed under the ruby license. 
+
+# Author
+
+Zach Dennis (zach.dennis@gmail.com)
+
+# Contributor
+
+* Blythe Dunham
+* Gabe da Silveira
+* Henry Work
+* James Herdman
+* Marcus Crafter
+* Thibaud Guillaume-Gentil
+* Mark Van Holstyn