Use PythonPathHelper instead of custom functions to search for Python files in existing folders.
Minor
Merge pull request #57 from AndrewFerr/exsources

Use PythonPathHelper instead of custom functions to search for Python fi...
Merge pull request #67 from AndrewFerr/aferrazz_dev

Fix some improper labeling of the Breakpoint Properties menu.
Replace non-comment occurrences of 'Iron Python' with 'IronPython'.