Open and Retrieve buttons no longer stay enabled while uploader is flashing firmware.
Merge pull request #214 from TauLabs/kenz/gcs_uploader_ui_fix

Open and Retrieve buttons no longer stay enabled while uploader is flashing firmware
Xcode project updates.
Merge pull request #218 from TauLabs/kenz/xcode_project_file_updates

Xcode project updates.