Feature: Add the possibility to add a request id

[syphax-bouazzouni]

With this PR, you can do now something like this (for example I will take FMA ontology)

ontology.explore.submission(1) # will call https://data.bioontology.org/ontologies/FMA/submissions/1

or

ontology.explore.classes("http://purl.org/sig/ont/fma/fma65139") # will call https://data.bioontology.org/ontologies/FMA/classes/http%3A%2F%2Fpurl.org%2Fsig%2Font%2Ffma%2Ffma65139

(deprecating the single_class: "https://data.bioontology.org/ontologies/FMA/classes/{class_id}" link)

It may sound simple, but was not possible before (as far as I know)

[alexskr]

@syphax-bouazzouni, is this PR up to date and is it safe to merge?

[syphax-bouazzouni]

@syphax-bouazzouni, is this PR up to date and is it safe to merge?

Yes, it is up to date and safe, as it has been in production at Agroportal for 1,5 years.