More modeller progress

Doo-be-doo-be-do, bet you can't guess what I'm still working on! Ding ding ding, Character Modeller program.

Some really sweet improvements in this upcoming version, the full details will be released with the release of the next version but a sneak peak:

• Motion parameters UI in info pane / can set motions to be "Loop" which affects how interpolation works on the start and end keyframes
• You can now click on bones from the bone list to select them. Sweet, a convenient way to switch between bones now. Although there is no way to rename bones in the application yet.
• Background brightness value is now in 20% increments.
• Alignment tool was fixed to take proper offsets into account. It was confusing to the user before if the sprite had been "AlignR"'d before "Align"'d.
• A latent but warmly welcomed bugfix in the bone chaining matrix multiplication algorithm now fixes certain combinations of transformations which had unexpected results. Now everything (translating, rotating, moving, scaling, sizing) works "as expected" in any combination. (More thorough testing required.)

Next on the list of improvements is being able to name and re-order bones (for Z-positioning) and then next big implementation is the previewing of combinations of motions.