Set Ticker only one time

The createjs.Ticker is only one, we don't need set the FPS
for every canvas.
Don't hide letters in the matrix on mouseover

This is not needed, because we are drawing over them,
and make the animation faster because we don't need update
the cache in the main container.
Avoid text selection in the activity canvas
Move all the definitions related with do objects at the beggining

In activity.js we reference objects in the html page using
document.getElementById(). Webkit in Android is confused if the
variables are not defined at the beggining.
When the activity is used in andorid don't show the toolbar

This methood hide the tolbar and add the buttons to a new div.
Is not a perfect silution, because the toolbar is displayed briefly
before remove it.