add client side plugin support

rewrite lifts as a client side plugin
add client-side twitter plugin

render tweets and use entities to analyze tweet content and add links
and images based on it
add client-side weather plugin

display link to Weather Underground website
Flag to denote a single resort is to be displayed
Single resort cannot be closed
Display resort extras in a second column
'Plan trip to ...' displayed in the second panel for single resorts
Clearfix on visible
Fixed exception thrown when resort displayed in widget