Fixed: Entities missing world reference in when removed was called.

This is the behaviour in the current version of FP.
Merge pull request #33 from MaskedPixel/master

Updating API to current FP version.
Removing ui directory due to lack of use
Initializing Entity _name for neko target
Updated CHANGELOG and version number to 1.6.7
Amending CHANGELOG for 1.6.7
Fixed:  Entities can only be added to the world once per update.

If an entity were to be added like:

var e:Entity = new Entity();
add(e);
add(e);

An endless loop was caused because _updateNext in that Entity would
reference itself.
Merge pull request #34 from MaskedPixel/master

Fixed: Entities can only be added to the world once per update.
Changed _renderFirst, _renderLast to IntHash
Preloader compiles for html5 (uses default)
Merge branch 'master' of github.com:MattTuttle/HaxePunk
Extra command line options added for SetupTool
Cleaned up directory creation function
Removing unused code
Console is no longer created by the Engine class
updated the template for new projects
Merge pull request #36 from tangerinagames/master

Fix the name of the generated binary
addGraphic no longer creates a list if graphic=null
Moved assets to haxelib, using include.nmml for HaxePunk defaults
Removing ui module