Add description to the annotations

[anitacaron]

Fixes #52

It's missing the description for the annotations:

• language:ISO639-3:description
• language:ISO639-3:id
• language:crossref
• sub:groups
• population:genetic:study
• population:microbiome:study
• population:joshuaproject:description
• population:googlebook
• population:distribution
• population:peoplegroups:description
• number:populations
• population:language:spoken
• population:size
• population:crossref

[Melek-C]

Shall we add the description in the main file?

[anitacaron]

If you prefer, that's fine. But if I have the descriptions, I can also add them to this PR.

[Melek-C]

ok thanks @anitacaron!

[anitacaron]

@Melek-C, are you happy with this PR? If so, could you please add your review? I created issue #54 to remind us later about the remaining annotations without definition.

[Melek-C]

Hi @anitacaron here the some missing definitions:

• language:ISO639-3:description : The ISO 639 Identifier Documentation
• language:ISO639-3:id: Is an international standard for language codes in the ISO 639 series.
• population:genetic:study : Genetic study bibliographic reference.
• population:microbiome:study : Microbiome study bibliographic reference.
• population:joshuaproject:description : “Joshua project’s” population description.
• population:googlebook : “googlebook” population description.
• population:peoplegroups:description “peoplegroups” population description.
• number:populations : Number of populations in the group.
• population:language:spoken : The language spoken by the population.
• population:size : The total number of individuals within a population

These annotation exist in only one or two populations (we should discuss if we keep it or not):
• population:distribution Distribution map of population
• sub:groups

No mapping for these annotations:
• language:crossref
• population:crossref

[anitacaron]

Thank you, @Melek-C!

For language:crossref and population:crossref, I added a definition as they're a grouping annotation.