Add support for Lua and Moonscript languages.
user/jszakmeister: add a snippet to print the stack trace in python

This will print the current stack trace at the line being executed.
It's a nice debug tool when you need to know what the call chain is.
user/jszakmeister: conditionalize any code that uses python
user/jszakmeister: disable ultisnips if python is not available
user/jszakmeister: update my snippet template
user/jszakmeister: start snippets for cmake
user/jszakmeister: allow the default font size to be overridden locally