update CampaignMgmtSetup.php

Adding instructions on setting up campaign groups directory at top (in
Preliminaries) rather than later... and have everything saved there.
Update CampaignMgmtConfigure/Setup/Upload

Now need to actually upload files.  Use pickFile.php to test
uploadFile.php.  uploadFile.php now has the upload directory as a
variable in case we want to use it.  uploadFile.php will only upload
group and mission files.