Remove smart positioning of dialog since it's buggy.
Merge pull request #218 from tobyk100/dialog-style-fix

Remove smart positioning of dialog since it's buggy.
Updated artist levels' starting direction.
release 0.0.27
Let bootstrap handle default modal position.
Fix the autogrow of the feedback box by autoscroll.
Merge branch 'master' into tutorial
Switched from scroll to hidden to remove scrollbar.
Merge pull request #219 from nanan9177/tutorial

Fixed the growing feedback message on mobile.
Add sound caching for desktop, and disabled sound effects for mobile.
Fixed feedback messages for empty blocks.
Merge pull request #220 from nanan9177/tutorial

Add sound caching for desktop, and disabled sound effects for mobile.
Merge branch 'master' into blockly_fix
Updated the background, tileset (Nan's draft), check marks.