Merge pull request #1 from rocki123/master

Added SmoothFollow Component.
Fixed GetPixelSize.
Added GameTime
Merge pull request #2 from rocki123/master

More smoothfollow changes.
Merge pull request #3 from rocki123/master

Tween
Tween tweeks and fixes.
Small debug fix.
Tween fix.
another Tween change.
Some readme and import changes.
Added sprite align.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	Engine/Components/Tween/Tween.go
	Engine/Components/Tween/loop.go