Adding RCUE Popovers Component

1. Added popover component, skinned it.
2. Wrote a jQuery utils function to add CLOSE (X) icon to popovers if users include data-close="true" attribute to the buttons.
3. Popover: clean rcue-util.js and popovers HTML example
4. Popover: alpha variables; add right-padding to title if x icon is enabled
Adding popovers
Updating version number