Embedded JavaScript templates. Features:

* Control flow with <% %>
* Escaped output with <%= %>
* Unescaped raw output with <%- %>
* Newline-trim mode ('newline slurping') with -%> ending tag
* Whitespace-trim mode (slurp all whitespace) for control flow with <%_ _%>
* Custom delimiters (e.g., use ' ?>' instead of '<% %>')
* Includes
* Client-side support
* Static caching of intermediate JavaScript
* Static caching of templates
* Complies with the Express view system