Use get_html_id in place of html_id for yui. Should use get_html_id because it provides a hook point, also in gchart we use get_html_id, so keep it consistent
'styles' in yui corresponds to 'options' in gchart.
Added demo yui styles
Use get_options_json in place of get_options
Merge pull request #8 from agiliq/refactor-yui

Refactor yui