Appmaker Logo for icons in app manifest

1. Added binary/string compatibility to s3-store.
2. Added createIconPath to url manager to create icon paths for manifest.
3. Added 3 image sizes: 60, 79, 128.
4. Added logic for generating icon json for manifest in publish.js
5. Added logic to load icon image data into memeory in publish.js.
That space after function is gross.