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"
For tiling, we will need to know the actual source size in addition to
the scaling factor that can be different. So store the scaling factors
in the scene command, as well as an offset where to start.
This is more accurate in case of clipping and rotation.
For rotation that doesn't matter (appart from the fact that the testing
can now be more strict)
But for clipping this prevent glitches with partial rendering where it
would seem like the image are moving a bit by a pixel when it is redrawn
with a different clip
The current implementation of the software renderer doesn't drawn the
background under the border, so if the border is translusent, we don't
see the background color.
This patch blend the color of the border with the coler of the
background.
Software renderer part of #1988 (minus clipping)
