version to 0.2.0

first alpha release:

* setup benchmarking against RABL #1
* Readme with usage/notes details on template rendering #2
* basic template class with source file and locals #3
* api rename change: Template -> Render #4
* first pass at Template class with `node` and `map` implemmentations #5
* have templates evaluate given source files #6
* apply locals to template scope as reader methods #7
* Source object for rendering templates #8
* updated bench scripts to bench against Nm #9
* `render` and `partial` template and source methods #10

/cc @jcredding