Prepare for 1.9.1
Extend paging test

Tests page=0, POST and authentication
Fix paging with queries starting with comments

Closes #144
Includes testcase
Release 1.9.1
Adds support to append logs to file with log4js. It listens to HUP signal to re-open the log file. In case the specified log filename is not writeable the server will not start.
requests associated with formats based on postgres expose a cancel method that will be called on client request abortion/cancelling so postgres can cancel ongoing queries
removes unneeded comma
try to use postg(res|is)-9.3 instead of 9.1
CDB-3079 simplify installation relying on default postg(res|is)
CDB-3079 uses addons as per http://docs.travis-ci.com/user/using-postgresql/
CDB-3079 installs gdal
CDB-3079 tries to use cartodb flavour of postgres/postgis
CDB-3079 yet another try to use cartodb flavour of postgres/postgis
CDB-3079 enforces postgres user in preparation script
CDB-3079 enforces postgres user in preparation script
Merge branch 'CDB-3079' of https://github.com/CartoDB/CartoDB-SQL-API into CDB-2096-logs
Merge branch 'CDB-3079' of https://github.com/CartoDB/CartoDB-SQL-API into CDB-2038
Merge branch 'CDB-2096-logs' into cdb

Conflicts:
	NEWS.md
	app/models/psql.js
	package.json
Merge branch 'CDB-2038' into cdb
CDB-2038 adds entry to news related to query cancelling