Comment 3 for bug 917223

I partially undid this in r720 by adding the THIRDPARTY_DIR back to sys.path due to the pytz in thirdparty doing imports of its own components which expect itself to be in sys.path (example error: http://pastebin.com/rYC0NYm4). THIRDPARTY_DIR is now appended to the end of sys.path however, which should fix a local pytz never being used.