Merge pull request #996 from jeroenverfallie/dev

Fixed pixel perfect dragging
Debug.preUpdate was still being called in the Game Loop even if enableDebug was set to false (thanks @qdrj, #995)
Updated build files with patched Pixi UMD statement.
NuSphere updates
Added game.add.plugin to the definitions file
Temporary fix for #997
Merge pull request #998 from alvinsight/dev

Added game.add.plugin to the definitions file
Reverting to a 2.0.7 release to fix the issues with Image / RetroText / Buttons.
Pixi 1.6 patches for RenderTextures and IE9 Float32 calls.
Restored old Image object.
Updated docs.
New build files.
Fix issue #883

Check if points is an Array before parsing arguments.
fixed onPackComplete Signal
Fixed pixel perfect dragging, this was still using the old property 'pixelPerfect' instead of the new 'pixelPerfectClick'
Debug.preUpdate was still being called in the Game Loop even if enableDebug was set to false (thanks @qdrj, #995)
Updated build files with patched Pixi UMD statement.
NuSphere updates
Added game.add.plugin to the definitions file
Temporary fix for #997