Slight changes/fixes made to multi-selector

A couple of changes to the multi-selector mainly involving the ability to have more than one multi-selector on the same page.

The was also a bug in the calling of object added event for preloaded ids that were not telephone numbers to be added but rather references to already existing contacts.

Some changes were also made to allow multi-selector to be usable for jQuery version 1.7.1

Looking forward to giving any clarification if needed.

Thank you!