Create avrg.html

Average widget. It recives Floats (one by one) and calculates its average. 
There is an issue with the CSS, feel free to review it.
Create max.html

Listens for Floats and saves the max of them
readme update
Update README.md
Counter can now increment by an editable value.
Header component now has a "navigate here" action.
Added a 'broadcast current time' action to the button
Creating empty fonts.css
Referencing proper fonts.css
Merge branch 'master' of github.com:mozilla/appmaker-components
Whoops, now using the correct url.
tabbing
Merge branch 'master' of https://github.com/mozilla/appmaker-components
button element has multiple broadcast channels
Merge pull request #79 from secretrobotron/multiple-broadcast-channels

Multiple broadcast channels
Merge pull request #78 from secretrobotron/master

Readme updates
Not relying on postset -- which isn't there withough ceci-ui.
Making counter not recurse
broadcast type names camelCased
Merge branch 'multiple-broadcast-channels' of github.com:secretrobotron/appmaker-components into multi
setting the instance value