Version 1.12.0

New functionality

• Add Responsive Breakpoints cache
• Add picture and source tags
• Add fetch support to overlay/underlay (#189)
• Add async param to uploader (#193)

Other changes

• Convert CoffeeScript source to JavaScript
• Refactor compiled coffee to proper JS
• Remove old lib files
• Move all sources from src to lib
• Move cloudinary.js inside the src folder
• Setup library and tests to run with either es6 or es5
• Apply babel to support older Node versions
• Refactor tests to use promises
• Fix Tests
• Refactor utils
• Move utils.js to utils folder
• Add ensurePresenceOf and rimraf utility functions
• Add nyc for coverage and update sinon
• Add "Join the Community" (#201)
• Use upload params in explicit API
• Fix raw convert test