Make web quickstart work better in PhoneGap

* Add <meta name='viewport'>, since PhoneGap for WP7.5/8 strictly
requires it
* Explicitly fetch external scripts via https://, since
protocol-relative URLs won't work inside PhoneGap (note: this doesn't
risk extra warnings, because we were already fetching the
MobileServices.Web-xxx.js over https)
Display any errors on screen in web quickstart
Fix character encoding issues in Chrome on Mac

Example:
http://social.msdn.microsoft.com/Forums/en-US/azuremobile/thread/97b23507-b30e-4001-a967-d7127c0fc314
Merge pull request #54 from WindowsAzure/web-improvements

Make web quickstart work better in PhoneGap and Mac