Added new trasition time and timing function
Renamed variables to make compatible with other transition names
Added transition for opacity
Added new alert-close class to enable animation on close
Removed unused animation and speed from settings
Adding .alert-close to animate close
Using transition-end to detect animation completion
Newly introduced alert variables added to settings
Updated to enable callback on close
Update settings file
Merge branch 'alert-css3-animation' of https://github.com/NikhilKalige/foundation into NikhilKalige-alert-css3-animation

Conflicts:
	js/foundation/foundation.alert.js
Add jQuery animation fallback for IE9.