Initial github import of liquid

CHANGELOG

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+Changelog
+
+Added If with or / and expressions
+
+Implemented .to_liquid for all objects which can be passed to liquid like Strings Arrays Hashes Numerics and Booleans. 
+To export new objects to liquid just implement .to_liquid on them and return objects which themselves have .to_liquid methods. 
+
+Added more tags to standard library
+
+Added include tag ( like partials in rails )
+
+[...] Gazillion of detail improvements
+
+Added strainers as filter hosts for better security [Tobias Luetke]
+
+Fixed that rails integration would call filter with the wrong "self" [Michael Geary]
+
+Fixed bad error reporting when a filter called a method which doesn't exist. Liquid told you that it couldn't find the 
+filter which was obviously misleading [Tobias Luetke]
+
+Removed count helper from standard lib. use size [Tobias Luetke]
+
+Fixed bug with string filter parameters failing to tolerate commas in strings. [Paul Hammond]
+
+Improved filter parameters. Filter parameters are now context sensitive; Types are resolved according to the rules of the context. Multiple parameters are now separated by the Liquid::ArgumentSeparator: , by default [Paul Hammond]
+	{{ 'Typo' | link_to: 'http://typo.leetsoft.com', 'Typo - a modern weblog engine' }}
+	
+
+Added Liquid::Drop. A base class which you can use for exporting proxy objects to liquid which can acquire more data when used in liquid. [Tobias Luetke] 
+
+  class ProductDrop < Liquid::Drop
+    def top_sales
+       Shop.current.products.find(:all, :order => 'sales', :limit => 10 )
+    end
+  end   
+  t = Liquid::Template.parse( ' {% for product in product.top_sales %} {{ product.name }} {% endfor %} '  )
+  t.render('product' => ProductDrop.new )
+
+
+Added filter parameters support. Example: {{ date | format_date: "%Y" }} [Paul Hammond]