Sticky element directive

This is a sticky header directive written in native angular and vanilla javascript.

####To use : bower install sig-sticky-header

Add the sigStickyHeader module to your app.

####Example:

<div sig-sticky-header></div>

In order to style the states of an element, sigStickyHeader provides sig-sh-fixed class for when the element is sticky / sig-sh-original when the element is in it's original state.