Add project sampling support to Spine C3 texture.

Add project sampling support to Spine C3 texture.
Nearest, Bilinear, Trilinear.

Fix pixel rounding bug.

Fix pixel rounding bug.

Add Set Color, Set Color Attachment

• Set Slot Color (temporary until new skin set)
• Set Custom Color Attachment (set color of attachment of a custom skin and set to the custom skin.)
• Fix one frame animation bug.

Fix PMA bug regression (introduced in 1.11.0)

Fix PMA bug regression (introduced in 1.11.0)

C3 Worker Mode supported

C3 Worker Mode supported.

Add runtime create and add skins

Add runtime create and add skins

Change png path separator to comma instead of space

Change png path separator to comma instead of space which matches the existing skin path separator.

Multiple Atlas pages

• Add support for multiple atlas pages (use a space separated list of png files in the png path property)
  • Note that multiple png atlas pages may not be as performant as a single page, so only use when necessary.
  • Most devices support up to 4096x4096 sprite sheet. Use options to pack the sprite sheet as tight and efficiently as possible on export.
• Finish implementation of Set Attachment action.
• Fix support for webGL1 ,revealed on iOS (regression with introduction of SpineBatch support.)

Move spineBatcher.init() to prevent race condition

Race condition revealed on iOS (a different / not full initialized canvas), move init to first tick of a Spine object instance.

On instance Release() delete entry from spineBatcher

On instance Release() delete entry from spineBatcher.

To ensure spineBatcher does not render spine instance into texture after the associated C3 instance is deleted.