Updated vt-notify.rb by @harmj0y

Rob,

You don't have to accept this pull request, but seeing as we used and slightly modified vt-notify for use within Veil, I wanted to make sure to send you the changes we made just in case you needed/wanted to look at them.  @harmj0y largely did all the changes, they work really well with Veil.

Thanks again for writing this, it's awesome.


Added...: Ability to do a single quick run when specifying the interval as 0
Changed.: E-mail to use gmail specifically (may change it back to any smtp)
Added...: Only attempts to do gmail gem import when specifying e-mail accounts
Changed.: Hashlist can be in a format of hash:exename