Refactor ActionTag to expose a UnitTag() method.
good rename suggestion from Horacio
make the use of t.id consistent
no need to export internal attributes
Refactor per @thumper.  One key difference from his suggestion is that I have exported names.ParseActionId, because it's still useful outside of the names package
Don't export ParseActionId
Expose Sequence
Merge pull request #11 from johnweldon/action-unittag

Refactor ActionTag to expose a UnitTag() method.  
Also restructure internals of ActionTag to be more useful.
Refactor ActionTag...

... to accept either Unit or Service prefix.

Also NewActionTag() takes an actionId now
Rename HydrateActionTag to JoinActionTag
Merge pull request #12 from johnweldon/actiontag-refactor

Refactor ActionTag to accept more than just Unit prefixes
Make NetworkSnippet an exported constant.
Merge pull request #13 from tasdomas/network-regexp-public

Make NetworkSnippet an exported constant.