Implemented gauges and other chart types

- Added highcharts-more.js and highcharts-solide-gauge.js to enable more
chart types.
- Re-organised package files (/lib/...)
- Updated Readme.md
- Used un-minified source

Notes:
- I am not sure if your helper still works :D 
- I will provide some examples, including a reactive one, once you accept the pull request and the updated version is available through atmosphere