Fix setting of query based on availability of PyQuery.
Fix setting of query based on availability of PyQuery.

If PyQuery isn't available, it just doesn't set self.q
and later, when it is accessed in __call__, it throws
an exception. The solution is to set it to None if PyQuery
isn't available.

hyde/hyde,bheesham/hyde,hyde/hyde,jd/hyde,netzverweigerer/hyde,jd/hyde,jngeist/hyde,jngeist/hyde,hyde/hyde,bheesham/hyde,netzverweigerer/hyde,bheesham/hyde,jd/hyde,netzverweigerer/hyde,jngeist/hyde