chore(git): don't track pow-edit app
feat(editorView): improve map pan by binding to the document mouse events
feat(appController): set up explicit document binding for types

- use ng-switch to render the proper viewer type by file extension
feat(fileTree): add viewer for image file types
style(fileTree): adopt less intense file/folder icon colors
fix(editorView): properly clean up pixi and rAF loop on destroy

- track whether scope is dead and stop requesting new anim frames when it is.
- destroy the stage and its objects when the scope is destroyed.
feat(editorView): asynchronous map loading that can be canceled

- Finally loading the whole browser quest map isn't a "Oh shit" mistake.  Just click on another map.
- Basic task processor for loading maps.  It's really dumb right now, but can be made to be smarter.
- Good enough for v0.0.1 bump.
style(editorView): visual loading polish

- Display the name of the layers being created during load time.
- Give the loading notify a background color to keep loading assets from eating up its text.
chore(deploy): release v0.0.1