Easily change FButton elements at runtime
Rename LocalToLocal for clarity

There was some confusion over the use of LocalToLocal(), so I renamed it
to OtherToLocal() and I also created LocalToOther().

Closes issue #92
Removing font rounding code

There was some code in FFont for rounding fonts to the nearest pixel,
but it seemed to cause more problems than it solved, so I got rid of it
(well the method is still there, but no longer in use).
Updating demo project for new OtherToLocal()

Updating so it works with 040ca51