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.

Updated SDK to OSX 10.8.

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?