Add support for only one last `@supportURL` and fix naming standardization

**NOTE**: It appears that Zren is using `.meta` to be the actual metadata block items and so any manipulation of these should be stored elsewhere just in case `collaborators`, etc. is ever used/supported in a metadata block... doubt it will based off of Anthony's prior responses but does make the code simpler to read.

Applies to:
* #174
* #161

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**WARNING** Untested due to dev script pages being offline.