check connection before reading. Fail if unable to connect
Tell a user that they can use the extant cache to write
better grammar
It's an error not a warning, and suggesting that DB settings are at fault
Merge pull request #27 from llimllib/llimllib-better-cache-message

Tell a user that they can use the extant cache to write
Merge pull request #26 from llimllib/llimllib-fail-early-on-invalid-db

Check connection before reading. Fail if unable to connect
improve load performance of large limit-to geometries
handle shapely errors when creating clipped limit-to geometries
update invalid polygons with additional mapping
Merge branch 'master' of https://github.com/olt/imposm into update_invalid_geoms

Conflicts:
	imposm/db/postgis.py
add example to default_mapping for validationtables
fixed missing polygon parts in limit-to intersections
refactored polygon validation
Merge branch 'master' into update_invalid_geoms