Make Facebook like box visible during offline use

The Facebook like box is not visible during offline use. This
happens due to a Facebook SDK bug due to which it is unable to
set the width and height properties of the like box elements.
Therefore, set these properties using CSS to work around this
bug and display the like box.
Fix bug to display version number in footer

In the 'License' and 'About' pages, a JavaScript bug prevents
the version number of QuickQWERTY from being displayed in the
footer. The bug is due to Tutor related code in these two pages.
It's a bug because the Tutor object is undefined in these two
pages. Remove this Tutor related code from both pages to fix the
bug.