initial audio

- initial dialogue
- fixed some bugs in MoviePlayerView.lua
- fixed some null pointers in the level editor and added the correct characters
- TODO: fixed the file path for audio to be file.url, but the prefix needs to be removed, we just need the root of the directory so the file path is relative to the main.lua; it's assumed that the levels*.json are in the same directory as the main.lua… for now.
better bullets & fixes

- easier to see bullets
- improvements to level editor
- support for audio in file directories