Use 'regex' library instead of 're'

Try to use <https://pypi.python.org/pypi/regex> instead of python default "re"
regex library. Python default regex library "re" has now an artificial
limitation of 100 named groups:

File "/usr/lib/python3.3/sre_compile.py", line 505, in compile
    "sorry, but this version only supports 100 named groups"
    AssertionError: sorry, but this version only supports 100 named groups