Add test PostGIS database setup to Travis config.
correct postgis package name for Ubuntu 12.04 in Travis config
spatially enable database as user postgres for Travis
switch to postgis2.0 for travis
modify package install to avoid postgis_topology.control duplicate package error in travis
switch to stable ubuntugis repo
correct ppa name for ubuntugis
accept prompt to add ppa; remove postgis env
use auto-test instead of test so travis will not hang
gitignore logs and test results