L.Util.template fails for templates with double quotes.

[jieter]

When passing a template with double quotes, creating the compiled template fails with Uncaught SyntaxError: Unexpected string

example:

L.Util.template('<img src="{href}" class="{className}" />', {
    href: 'http://leafletjs.com/docs/images/logo.png',
    className: 'thumb'
});

creates a str in compileTemplate like this:

"<img src="" + o["href"] + "" class="" + o["className"] + "" />"

Which obviously needs some escaping...

http://jsfiddle.net/jieter/dCHLt/