Add:
    c.py
        - CTreeCutter class is very similar to PyTreeCutter. It utilizes
          self.cache as opposed to PyTreeCutter which doesn't yet.
        - CTreeCutter visit functions simply add start and end lines of
          the node to the cache, and visit_Decl pushes the cache onto
          accum.
        - parse_c performs a task identical to parse_py.  However, many
          c files need to be pre-processed before they are parsed.