Expose TypeScript types #47

Fix demo and CSS issues

• Moved away for UMD to CommonJS module format
• Moved tests to Jest
• Make it friendly to Browserify #42

• Add openAtDepth function #34
• Fix function name RegExp #36

• Update index.js so it finds an empty object even if it is not open
• Rename webpack output from bundle.js to json-formatter.js

Changes

• 1056ed1 - Configurable open/close animation #22

This release includes:

• All of CSS classes are now prefixed.
• Removing and adding children on toggle is now animated
• Refactored in TypeScript
• CSS fixes
• A webpack build system
• Proper UMD support
• Updated documentation and demos