fixed some typos in comments
now using relative paths for embedded assets in sample projects

That makes it easier to compile them in other IDEs (like IntelliJ) because it may avoid having to modify the source paths.
added helper script for IntelliJ debugging

The Ruby script provides a workaround for a bug in IntelliJ: it does not copy the specified resources into the output-directory when running/debugging the app in the simulator. Configured as an external tool, the script can do just that.

-> https://youtrack.jetbrains.com/issue/IDEA-94578
added exception for 'starling/build' directory to gitignore file
enhanced handling of pass textures in FragmentFilter (closes #641)
fixed that pivotZ was not used for 'is2D' optimization in Sprite3D
some Sprite3D api reference updates
added project and modules for IntelliJ IDEA
minor changes for touch processing with TUIO lib