3.01 Beta "Check for Updates"

[Travis]

Unlike Gavin's experience (maybe something was quickly corrected), my 
Omnigraffle Pro "Check for Updates" found a 3.0.1 update, but it 
downloaded Omnigraffle 3.0.1 rather than Omnigraffle Pro 3.0.1.  Oops.  
Not a big problem; just thought I'd mention it.  Thanks for working 
hard to correct the 3.0 bugs.

-Travis