added auto compile task and http server task

grunt watch
grunt server
save node reference to array and pass the index as url parameter to the iframe
launch the animations or the timeout only after the widget is ready

when the widget is ready it will send a postMessage to the parent with the index of his reference on the widgets array
example page stylesheet update
ie8 support: event dispatch and listeners, html5 tags substitution
documentation update
Merge branch 'master' of https://github.com/greenapes/tarsier

Conflicts:
	README.md