Angular 4 Version 1.1.0

• Update Readme to point to HTTPS URLs of cloudinary.com
• Angular: Unit Test for gravity:auto (#99)
• Update README.md
• Fix handling of dynamic updates to public-id. Fixes #83 (#94)
• Add links to online samples to README
• Add start to npm scripts.
• Update sample apps to Angular 4.x. Make all projects use config.ts.
• Fix #89
• Add comments to ng2-file-upload usage