Strip leading and trailing whitespace in submitted candidate data
Strip leading and trailing whitespace in submitted candidate data

This introduces a new class, ``StrippedCharField``, which
inherits from ``CharField`` and backports its Django 1.9 ``strip``
argument (see django/django@11cac1b).  It replaces all uses
of ``CharField`` in candidate forms with ``StrippedCharField``.

Closes #333.

neavouli/yournextrepresentative,neavouli/yournextrepresentative,neavouli/yournextrepresentative,neavouli/yournextrepresentative,neavouli/yournextrepresentative