make pymysql usable inside web2py

CHANGELOG

@@ -10,6 +10,7 @@
   "from gluon.storage import Storage"
 - tests can only be run with the usual web2py.py --run_system_tests OR with
   python -m unittest -v gluon.tests on the root dir
+- updated pymysql driver
 
 
 ## 2.14.6

gluon/contrib/pymysql/__init__.py

@@ -89,7 +89,7 @@ def Connect(*args, **kwargs):
     from .connections import Connection
     return Connection(*args, **kwargs)
 
-from pymysql import connections as _orig_conn
+from . import connections as _orig_conn
 if _orig_conn.Connection.__init__.__doc__ is not None:
     Connect.__doc__ = _orig_conn.Connection.__init__.__doc__
 del _orig_conn