Move sea and ocean labels in places to water layer

[nvkelso]

I'm seeing seas in the "places" layer, but most of the water labels are in water.

[nvkelso]

From:
https://github.com/mapzen/vector-datasource/blob/master/queries/places.jinja2#L46

        {% if zoom >= 3 %}, 'sea'{% endif %}

[nvkelso]

Also ocean

[nvkelso]

Related: #400.

[nvkelso]

Load balancing to v0.8

[nvkelso]

Gotchas:

• ocean and Ocean are equivelant, both should be used in filters.
• reservoir and Reservoir are equivalent, both should be used in filters.
• The (capitalized) Natural Earth values don’t seem to be coming thru, but should be, instead they’re being grouped into lake, playa, and ocean.
• Alkaline Lake and Playa only exist in Natural Earth. Zooming in, your feature may disappear. Beware the desert around Great Salt Lake in Utah!
• kinds should probably only be lowercase

[nvkelso]

Working for as expected.