Disabled importing SNP data into de_rc_snp_info, because that table
contains only generic data, and is not needed for VCF data. See ticket-77
Updated the output of the loading script, removed the depth_treshold
when importing and added the separate alleles to the subject_summary
table
Updated VCF mapping process such that the dataset id is stored in the
de_subject_sample_mapping table (in order to maintain uniqueness)
Updated the way a reference genotype is determined. Now the script also
takes 0/. and ./0 as a reference.
ticket-96: enhanced mapping so that the columns assay_id and concept_code
in de_subject_sample_mapping are filled on import
ticket-96: The created assayId is also inserted into the
de_variant_subject_summary table now