Patch notes 1.0.5

This patch makes these updates:

• replaced the tutorial with a much more entertaining one
• improved the zoom in/out feature when using the map editor (it's done using mousewheel or +/- on keyboard)
• chains swing a bit more based on speed you hit them at when grabbing them
• a number of physics efficiency tweaks to help framerates
• fixed a bug with positioning of the troll sprite when it attacks