[COOK-3717] Pgdg repositories improvements

Signed-off-by: Sean OMeara <someara@opscode.com>
[COOK-3756] Change postgresql.conf mode from 0600 to 0644

Signed-off-by: Sean OMeara <someara@opscode.com>
Version bump to v3.2.0
Version bump to v3.2.1
[COOK-3851] Allow config file change notification    type to be specified by attribute, defaulting to :restart

Signed-off-by: Sean OMeara <someara@opscode.com>
[COOK-3611]Remove server bits and just install libpq-dev

Signed-off-by: Sean OMeara <someara@opscode.com>
[COOK-2954] Support Installing non-standard versions on CentOS 6

Signed-off-by: Sean OMeara <someara@opscode.com>
Version bump to v3.3.0
Version bump to v3.3.1
Version bump to v3.3.2
Version bump to v3.3.4
Changed default peer authentication in pg_hba-template to only reference "postgres" user, hence other node-specified hba-entries need to use "peer map=xy"
Implemented creating and including of a local.conf in postgresql.conf to be provisioned via shell and/or automated configuration management tools