Progress indicators

This adds a progress panel that provides some status updates for the check apps now, update repo, and send e-mail.

addresses issues #30 and #84 
I apologize for stepping on anyone's toes...
 
in the LGConfigurationWindowController.m I moved the dealloc and init methods to the top of the file. also I turned most of the alert modals to alert beginSheet that connects to the main window.

i'm guessing the progress-indicators branch is a devel branch, so I've made the pull request for that branch.