Move current code to legacy and create experiments folder

Hi Martin,

I divided the repository between *"legacy"* and *"experiments"* as agreed. In the *experiments* folder I've made a *st21* folder which should contain all the experiments made with the Sencha Touch 2.1 framework (still incomplete). Under that folder, I also put a .gitignore file to exclude the backup files created by Kate (which is, at the moment, the editor I use most).
I just left the README.md file outside 'cause it's empty.

I will send you soon an email with all the steps to launch the application, as well as some introductory links to Sencha in case you want to try to understand the code.

Bis morgen,

Vito