Tilequeue

------
* Emit additional metrics during intersection

------
* When checking to see if a tile has changed, compare ZIP file contents only. (See [152](https://github.com/tilezen/tilequeue/issues/152))
* On WOF neighbourhood update, return a better error message for invalid dates. (See [154](https://github.com/tilezen/tilequeue/pull/154))
* Remove "layers to format" functionality. (See [155](https://github.com/tilezen/tilequeue/pull/155))

------
* Roll back the use of psycopg2 connection pools. (See [149](https://github.com/tilezen/tilequeue/pull/149))

------
* Fix connection leak: Track connections before trying to use them. (See [150](https://github.com/tilezen/tilequeue/pull/150))
* Fix issue processing WOF data with z coordinates: Ignore extra coordinates, e.g: z, in reprojection. (See [148](https://github.com/tilezen/tilequeue/pull/148))

------
* Improve performance of GeoJSON and TopoJSON format generation by using ujson (See [139](https://github.com/tilezen/tilequeue/issues/139))
* Improve performance of MVT format generation by using builtin round function (See [144](https://github.com/tilezen/tilequeue/pull/144))
* Reduce database pressure by use psycopg2 connection pools (See [141](https://github.com/tilezen/tilequeue/issues/141))
* Reduce database requests by registering hstore/json (See [142](https://github.com/tilezen/tilequeue/issues/142))
* Reduce memory usage during tile seeding (See [126](https://github.com/tilezen/tilequeue/issues/126))
* Expose unique option for seeding tile generator (See [127](https://github.com/tilezen/tilequeue/issues/127))
* Support long zooms (See [130](https://github.com/tilezen/tilequeue/pull/130))

------
* Use queue name from message to acknowledge message. See [134](https://github.com/tilezen/tilequeue/issues/134).