Bump pg, remove silent-postgres.
Bump pg, remove silent-postgres.

Apparently pg 0.13.x fixed the warnings coming from Postgres.

kidaa/travis-core,kidaa/travis-core,GistIcon/travis-core,travis-ci/travis-core,jantman/travis-core,Tiger66639/travis-core,travis-ci/travis-core,GistIcon/travis-core,travis-ci/travis-core,travis-repos/travis-core,developerfm/travis-core,final-ci/travis-core,Tiger66639/travis-core,kidaa/travis-core,final-ci/travis-core,developerfm/travis-core,GistIcon/travis-core,jantman/travis-core,travis-repos/travis-core,developerfm/travis-core,Tiger66639/travis-core,final-ci/travis-core