Update protocol identification scheme

Created by: agraubert

Each tag for the identifier should be in the form of <tag-name:tag-data>. Additionally, a tag for the protocol identifier version is required <__protocol__:(version)>

A parser function should be added to parse all tags into a dictionary like:

{
    'tag-name': (the tag data),
    'another-tag-name': (more tag data),
    ...
}