dateutil.parser.parse throws ValueError on crud date strings

[ranchodeluxe]

Issue #14 highlights we need to wrap dateutil.parser.parse:

>>> from dateutil import parser
>>> parser.parse('to blah')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/src/datefinder/venv/lib/python3.4/site-packages/python_dateutil-2.4.2-py3.4.egg/dateutil/parser.py", line 1008, in parse
  File "/usr/local/src/datefinder/venv/lib/python3.4/site-packages/python_dateutil-2.4.2-py3.4.egg/dateutil/parser.py", line 395, in parse
ValueError: Unknown string format

Fixed and added a passing test in this draft implementation

[akoumjian]

Theoretically we shouldn't be passing dateutil bad datetime strings. Not sure if this issue is ready to close or not.

[ranchodeluxe]

@akoumjian: yep, that was in the PR #19 thanks! We agreed to let it bubble