[Feature Request]Extend OBO parser to fully support the obo flat file 1.4 specifications

[kMutagene]

Is your feature request related to a problem? Please describe.
The obo module is incomplete, we have a makeshift parser for terms and that's it.
This document contains the formal full specs.

Describe the solution you'd like
Extend the parser to parse at least all stanzas, maybe parse the full specs (low priority)
Add writers for round trip testing(low priority)

Describe alternatives you've considered
As always we can just not do it, the parser is enough for our uses right now.