Changed the behavior of argument parsing:

• label now has to be the first argument (or $4 with Jamf)
• you can override variables with arguments 2 and up, order remains irrelevant ($5 and up with Jamf)
• parsing variable arguments now happen after evaluating the label

This re-ordering of evaluation now allows you to override values set in the actual label with arguments.

This can allow admins to temporarily override broken downloadURLs or appNewVersions.