Multiple updates

- use wx save file dialog directly for wx 2.9 and above as PythonCard dialog is broken beyond 2.8. (#43)
- send error info (memory error and unknown error) to log window instead of printing to terminal (#52)
- allow arbitrary node ids in network mode (#51)
- generic fix in profiler for machines where the python resource module is not available (without hardcoding windows check)
- added pip requirements file, and a unix setup script to make it easier to install on unix like systems