Merge pull request #2 from Martindelataille/master

Review
change url
remove not need if
handle input change
update README
add 1 more example with a 0 selected value
review code variables and add namespace option
improve default style
place element using after instead of append
set input css 100% menu width
update bower config file
change function name
change function name
render label as text (not html)
add hidden class to play nicely with css animation
update version to 0.2.1
remove $wrapper around tags to make the add button always aligned
set the focus into the textfield
improve default style
add style for checkbox