v0.1.1

This contains a bunch of bug fixes for problems found after using the parser and syntax tree "in anger" for the first time. It also make some big changes to the build system.

• The build system is now all CMake, with documentation, coverage and testing all integrated.
• Fixed bug where identifier names were not correctly copied out of the lexer and into the AST
• Fixed bug where module port names were not returned as the correct data type.
• Fixed a dumb buffer overflow which caused travis to error our, rather than cause a fail message.