Tests of findability at the prime meridian and dateline.

Targets are short linestrings that cross the prime meridian and
dateline at a constant latitude.

What to do about dateline-crossing features and queries is going
to be an interesting issue.

See #54.

Use uniq on query response using id to dedupe.
remove parseQueryResponse
records arent sorted anymore
Merge pull request #60 from mapbox/issue54

Tests of findability at the prime meridian and deduplication