Updated the version from 1.1 to 1.2
Renamed the header to "Slint Royalty-free Desktop, Mobile, and Web Applications License"
Added definition of "Mobile Application" and grant of right
Moved "Limitations" to 3rd section and "License Conditions - Attributions" to 2nd section
Added flexibility to choose between showing "MadeWithSlint" as a dialog/splash screen or on a public webpage
Moved the para on copyright notices to section under "Limitations"
This is needed in the future to be able to roll back state within the
line breaking when we can't fit even a single word into the line and
have to go back to fitting glyph by glyph.
For the unicode line break iterator the clone is a little more complicated.
The iterator is clone, but the type is anonymous. I first had an
implementation to moved the iterator into a closure, which was cloned
via another control closure. But that's complicated and still involves
allocating the various bits & pieces the closure captures.
So instead the simpler solution used here is to allocate the breaks
into a shared vector.
The unicode linebreak iterator always produces a mandatory break at end
of text. This is not only confusing, but also inconsistent with the
simple line break iterator and with trailing spaces it could cause the
line break algorithm to emit empty lines at the end of text.
