set buffer_size at render time (in two places for forward and back compatibility) - refs https://github.com/mapnik/node-mapnik/issues/175 and https://github.com/mapbox/tilelive-vector/issues/5
Revert "set buffer_size at render time (in two places for forward and back compatibility) - refs https://github.com/mapnik/node-mapnik/issues/175 and https://github.com/mapbox/tilelive-vector/issues/5"

This reverts commit ef89afc151af485cdd316a3d9eceb2f9e5711632.
add todo wrt to https://github.com/mapnik/node-mapnik/issues/175
bump to v0.6.0
fix engines declaration
bump to v0.6.1 with upgraded node-mapnik
bump to v0.6.2 with mime type support for new formats like webp:quality=80
use latest node-eio
explicitly request png32 images to keep tests passed before and after https://github.com/mapnik/mapnik/issues/2028
key image catch on format as well as rgba - refs #51
bump to v0.6.3 with cache key fix
travis: build against both mapnik v2.2.0 and v2.3.x
Allow users to configure strict mode via URI (#74)

I guess such change would require a minor version increment.
Loosen mapnik requirement to bet between 0.7.25 and 1.2.x

Closes #73
Add tests for strict/non-strict (default) load modes (#74)
Merge pull request #75 from Vizzuality/strictable

Allow users to configure strict mode via URI (#74)
Merge pull request #76 from Vizzuality/loosen-mapnik-req

Loosen mapnik requirement to bet between 0.7.25 and 1.2.x
bump to v0.6.4
Merge tag 'v0.6.4' into kx

Tagging v0.6.4

Conflicts:
	package.json