Improved projects/images, gemfile

1. Removed image name from projects/images file.
2. Added basic tool tip.
3. Re factored to avoid breaks on local dev environment. 
4. Updated gemfile to make it ruby 1.9.3 compliant.
5. Updated readme to make it 1.9 cartridge.
6. Upaded Gemfile and Gemfile.lock to use gems from rubygems.org.