Feature/668 install script sandbox error

Fix for #668.

Turns out that they are changing in Spring14 how email addresses are generated for sandboxes. With the new format it's not possible to deduce the real email, so we'll just wrap the email method in a try-catch to make sure it doesn't affect the installation.

https://help.salesforce.com/HTViewSolution?id=000193090&language=en_US