Change single quotes for doubles in tracker

This solves a strange problem with IE and Safari, who both seem to
decode %27 (to ') in javascript as it finds it. Meaning that if that
character code appears in a URL, then the ' becomes part of the
javascript syntax, which breaks every other part of the syntax.
Merge pull request #1 from mybuilder/shane_fix_quote_issue

Change single quotes for doubles in tracker