Added a Scene2DDebugRenderer.
Made colours configurable.
Table debug rendering included.
Small JavaDoc change.
Actors now know themselves how to debug render. Adjusted all tests. Added a new Scene2DDebugRendererTest.
Conflicts resolved.
Removed an unused method.
Small bugfix and renamed fields.
Removed the final modifiers for colors.
Javadoc
Support nested iteration.
Javadoc
Update Intersector.java

Added method for getting intersection point for two 2D rays.
Fix size-setting methods ignoring height

In ui.Container. I believe this wasn't intentional.
Merge pull request #2138 from Darkyenus/patch-1

Fix size-setting methods ignoring height
setBackground(null) has caused layout() to NPE
Merge pull request #2139 from Darkyenus/patch-1

setBackground(null) on Container has caused layout() to NPE
Don't write type on each element of typed array
Null checks for all properties.

#2030
Merge branch 'origin/master'