Aseprite v1.1.2-rc12 and v1.1.2-beta12

A new patch for the next release v1.1.2 is available.

The official branch (rc12) is a release candidate. It's like Aseprite v1.1.1 but with bug fixes and new features. The beta branch contains some special features and a complete new backend (a new way to handle mouse/keyboard events).

This patch includes some fixes from v1.1.2-beta11:

• Added unique zoom/position values in preview window per document (#959)
• Added RYB color wheel (#707)
• Fixed bug when moving selection with shift+arrow (#940)
• Fixed HSV <-> RGB conversion (#961)
• [beta] Fixed key modifiers (#954)