Removed unused env var APP_ROOT
Updated to ruby 2.1.4
Updated postgresql apt repo to trusty
Updated postgresql-client to v9.4
updated packages version info
make curl do not check SSL certificates (-k)
Reverted postgresql-client to v9.3
Changed work-around for http://git.io/Ke_Meg#1724
updated postgresql version
do not apt-upgrade. Trust the base image
updated bundler to v1.7.4