Add .ruby-version

Yes, it's still 1.8.7
Gemfile: Use https://rubygems.org
Prepare travis, database config
Prepare travis
Add database config for sqlite
Add MRI 1.9.3, allow failures
Setup teambox.yml
Travis: verbose copy, add mysql
Gemfile: Move sqlite to a standalone group
Travis: Enable postgres
Gemfile: SystemTimer dependency only for mri_18
Merge remote-tracking branch 'upstream/master'

Conflicts:
	.travis.yml