Add support for catching uncaught server exceptions with patchGlobal

[rgould]

I wanted to use meteor-raven while still capturing uncaught exceptions, so I thought I'd forward this functionality on. Thoughts?

[allaire]

👍 @deepwell I'm using your fork in the meantime @rgould

[deepwell]

Thanks @rgould, conceptually I like it and will get this in, but I want to play with the code a bit how to handle these multiple config options a bit better.