Fix loading scripts in popup

Change to not using background models & collections but using window.
Change jQuery CSS selector to CSS3 selector
Add a new method to activity list view

- getSelectedItems()
Update jQuery to v2.0.0pre from v2.0.0b1
Add real time activity list view
Fix a bit of white space
Add activity status styles
Add comment to Tab objects.
Refactor code

- Remove $ object binding
- Improve ActivityListView.getSelectedItems()
Bump version to 0.1.1
Update README.md for v0.1.1