Target v1.6.0
Tweak testcase to succeed with gdal-1.10

Absence of geometry column triggers a different behavior in 1.9 and 1.10
Honour skipfields in JSON schema response. Closes #109
Add note about why we want to skip querying geometry_columns
Add travis script
Add ubuntugis repo, hopefully gets newer postgis
Add ./configure step, drop unneeded env section
Install GDAL too
Add PostGIS dependency
Add small recipe about making new releases
Add GDAL and zip dependencies
Improve recognition of non-standard field types names by db lookup

Closes #112.
Only looks up "geometry" and "raster" types for now, can be improved
over time.
Import news section fro 1.5.4
Fix missing .prj file in shapefile format

Finds srid, when needed, with an additional query.
Closes #110.
Includes testcases.
Fix shapefile export for non-linestring results starting with NULL

Includes tests. Closes #111.
Upgrade node-pg dependency to 2.6.2

Simplifies PSQL.quoteIdentifier and exposes PSQL.quoteLiteral
Drop support for cluster
Add release date step
Release 1.6.0
Prepare for 1.6.1