Minor cleanup of isValidOutlineElement
Renamed object-utils.js to object.js

Renamed lucu.objectUtils as lucu.object
Created image.js

Moved image functions out of http.js and into image.js to improve
cohesion per file, updated dependencies
Created mime.js

Moved mime-related functions out of http.js to improve cohesion per file
Modularized mime.js

Updated dependencies. Also moved some entry functions from feed-fetch.js
into entry.js. Added new mime.getType function in prep to standardize
getting mime type header from httprequest