update rails for security reasons
require dependencies per bundler
add .gitignore by useing the github rails template
Merge pull request #25 from timoschilling/gitignore

add .gitignore by useing the github rails template
Merge pull request #26 from timoschilling/require_bundler

require dependencies per bundler
Merge pull request #27 from timoschilling/update_rails

update rails for security reasons