Adds timestamp to appcache

The appcache manifest is generated during deployment, so every deploy will invalidate appcache, which is the desired behaviour at the moment.
Modify Goggle UA tracking snippet
Adds link attribution to Google UA
Adds licence to the README
Upgrade Angular to 1.3.0-beta.7
Merge branch 'master' of github.com:javiercejudo/javiercejudo.com