Add introduction screen
Implement logic for intro buttons 'new' and 'continue'
Remove unneded file
Remove jquery, we are not using it
Initial implementation of use of android back button

Use the phonegap events [1] to detect the back button.
As we need load the cordova.js file, use a empty file as a fallback
too ise in Sugar. The cordova builder will replace it with
the file needed by the platform.
A complete implementation should see what stage of the game is active
and change to the previous page.

[1] http://docs.phonegap.com/en/3.5.0/cordova_events_events.md.html
Hide the toolbar by default

This is done to avoid display the toolbar at the start in android
Complete use of backbutton

Now pressing back button go to previous game state,
and eventually exit.
Move funtion definitions to outside of the domready event

The code hve mixed the function definitions with the code executed
on the do ready event. This patch move almot all the functions
outside.
Fix align and size of addWord button
Add random list of words

Based on a list of words from Art4Apps, modified to be loaded by require.
Other change was replace '-' by '_' as word separator, to make easier
cut the multiple word cases.
Version 1.13