1.3.0

Mostly internal changes to the templates. (Refactoring to make the .tplx files and the intermediate .tex file easier to read, and also to make inheriting from these templates easier.)
Added the ability to use:

--TemplateExporter.exclude_output_prompt=True
--TemplateExporter.exclude_input_prompt=True
--no-prompt

to remove input prompts, output prompts, or both.