Add mappings to ontologies

[cconrad8]

gf-dcc/portal#60

Cell metadata in obs (for ontology term IDs, the values MUST be the most specific term available from the specified ontology):
organism_ontology_term_id: NCBITaxon (NCBITaxon:9606for human, NCBITaxon:10090 for mouse)

donor_id: free-text identifier that distinguishes the unique individual that data were derived from. It is encouraged to be something not likely to be used in other studies (e.g. donor_1 is likely to not be unique in the data corpus)

development_stage_ontology_term_id: HsapDv if human, MmusDv if mouse, unknownif information unavailable

sex_ontology_term_id: PATO:0000384for male, PATO:0000383for female, or unknownif unavailable

self_reported_ethnicity_ontology_term_id: HANCESTRO use multiethnicif more than one ethnicity is reported. If human and information unavailable, use unknown. Use naif non-human.

disease_ontology_term_id: MONDO or PATO:0000461for 'normal'

tissue_ontology_term_id: UBERON

cell_type_ontology_term_id: CL

assay_ontology_term_id: EFO
single cell rna sequencing: EFO:0008913