* Moves relative path parsing away from the base mapper implementation
* Change argument parsing from splitting first line of source with ',' to use
AST traversal instead. This is not complete, but mostly PoC for now. Full
traversal into argument type nodes will allow us to get nested dict() etc.
We should open a ticket to track this work
* Cleans up some of the templates to reduce duplicate titles
* Adds a directive for nesting rST from constructs that might have headings.
Remove the first heading in this case to address the case where a module has a
docstring with a heading up front
* Adds tests
* Replaces example module with module that has more failing cases of parsing
Closes#78Fixes#80Fixes#81Fixes#82Fixes#83Fixes#84Fixes#85
