UMD issues fixed

Changes:

• Fixed issues with require and angular module being provided as object. Expects as function.
• Webpack config duplication removed.
• Example scripts moved to modules.
• Separate webpack config for building examples script - faster loading demos.
• Better Readme and demo landing page

Fixed issues with multiple & nested instances

Changes:

• Directives will expose methods to provided name in options to $parent scope
• On touch devices auto-scrolls will be canceled when user tries to scroll
• Examples have exposed methods tryout area
• Switched to yarn for development
• Switched to webpack for build
• Added webpack-dev-server for faster development

First stable beta release

The module is almost ready to be used everywhere. Please read the READ ME to know about all the feature.