Added option to use time of day encoder.

Fixes #16.
@subutai Good because I wasn't getting decent results. @chetan51 Seeing that the `GeospatialCoordinateEncoder` is configured like so:

                u'vector':    {
                    'fieldname': u'vector',
                    'n': 2048,
                    'w': 51,
                    'scale': 10,
                    'timestep': 10,
                    'name': u'vector',
                    'type': 'GeospatialCoordinateEncoder'
                },

what values should I use for `timeOfDay` above?