Modify current template engine wrapper to support more than just `map[string]interface{}` types.

[bbuck]

The current selected template engine is quick, but only supports map[string]interface{} types. This should be an obvious limitation, since a lot of the common structures that may need to be rendered are going to be handled as structs and not maps and requiring that all objects have a "build map before use" function or process is just unnecessary overhead. Sure, the reflection will add some weight, but I'd prefer simplicity in that case over tons of extra code.

[bbuck]

Rework template engine wrapper to convert structs and Lua types (if necessary) to map[string]interface{}.