Merge pull request #169 from SimonKaluza/develop

Changed the Gem::Installer::ExtensionBuildError to a Mixlib::ShellOut::S...
Bug fix release version 3.4.2
Merge pull request #170 from hw-cookbooks/develop

Bug fix release version 3.4.2
Merge branch 'master' of https://github.com/hw-cookbooks/postgresql