Add support for passing hash parameters to partials #93
This library is awesome, but I really wanted to be able to pass a bunch of parameters to a partial that were not in the root context (http://handlebarsjs.com/partials.html#partial-parameters).
I've added a new HashParameters expression that contains a collection of key value pairs (string, object) to achieve this. It supports the value being a string, int, bool or a context path.
I didn't have a massive amount of time to spend but I have written a bunch of unit tests and everything looks good.
Let me know what you think.