modified:   lib/mparser/Makefile
new file:   lib/mparser/astnode.c
new file:   lib/mparser/astnode.h
new file:   lib/mparser/tests/astnodetest.cpp
- Implement a tree-like structure to contain emitted AST info from the
  parsed code.
- Added a respective test (based on gtest framework).
modified:   .gitignore
- Ignoring *test executables.

modified:   lib/mparser/mparser.hpp
modified:   lib/mparser/parse_matlab.cpp
- Started using astnode by linking the header and modifying ParsingResult
  structure.