making the custom postgresql recipe dependency explicit

fixes #47
Bumped up vagrant version and other related dependencies in order to
support VirtualBox 4.2+ (fixes #46)
Merge pull request #48 from javornikolov/bumpup-vagrant-for-vbox4.2-support

Bumped up vagrant for VirtualBox 4.2 support
removing guest additions reference in README

These are already included in the VM, I believe.
Derby: tablename uppercased for column lookup (fixes #22)
README: remove reference to VirtualBox version
moving Oracle FlowMode tests to JavaTests folder (#44)
moving Oracle Standalone tests to JavaTests folder (#44)
moved all remaining Oracle tests from DotNet to Java (#44)
moving docs into master, gh-pages is now only publishing
publish-to-gh-pages now pushes gh-pages branch
moving stuff from README to CONTRIBUTING
Update README.md
README: fixed link to CONTRIBUTING file
making the Derby FlowMode setup like the others
consolidating most of the Clean tests (#23)
reducing duplication in Clean tests (#23)
bulking up Clean table coverage before refactoring (#51)
Oracle FlowMode suite now uses CleanSuite (#23)
fixed symlink name for oracle clean suite (#23)