Updated SDK and prevent blank project names.

Hello! I have been taking a look at this tool (love it btw) and made the following two revisions so far.

1. Updated SDK to OSX 10.8.

2. Addressed issue "Error while opening with an empty project", adding a check to make sure that the provided string is not blank.

I am not sure if this project is still under development, but I would like to help with possible. If the changes look good, would it be possible to pull?