Attempt to use postgresql 9.5

.travis.yml

@@ -1,10 +1,6 @@
-sudo: false
-
 addons:
-  postgresql: "9.4"
   apt:
     packages:
-      - postgresql-plpython-9.4
       - pkg-config
       - libcairo2-dev
       - libjpeg8-dev
@@ -12,6 +8,17 @@ addons:
 
 before_install:
   - npm install -g npm@2
+  - lsb_release -a
+  - sudo mv /etc/apt/sources.list.d/pgdg-source.list* /tmp
+  - sudo apt-get -qq purge postgis* postgresql*
+  - sudo rm -Rf /var/lib/postgresql /etc/postgresql
+  - sudo apt-add-repository --yes ppa:cartodb/postgresql-9.5
+  - sudo apt-add-repository --yes ppa:cartodb/gis
+  - sudo apt-get update
+  - sudo apt-get install -q postgresql-9.5-postgis-2.2
+  - sudo apt-get install -q postgresql-plpython-9.5
+  - echo -e "local\tall\tall\ttrust\nhost\tall\tall\t127.0.0.1/32\ttrust\nhost\tall\tall\t::1/128\ttrust" |sudo tee /etc/postgresql/9.5/main/pg_hba.conf
+  - sudo service postgresql restart
   - createdb template_postgis
   - createuser publicuser
   - psql -c "CREATE EXTENSION postgis" template_postgis