DISCO: add MGI genotype-phenotype associations

ftp://ftp.informatics.jax.org/pub/reports/index.html#pheno

MGI_PhenoGenoMP.rpt

we will need additional information brought in for MGI. including some basic information about strains, alleles, and genes.

ftp://ftp.informatics.jax.org/pub/reports/MGI_Strain.rpt
ftp://ftp.informatics.jax.org/pub/reports/MGI_PhenotypicAllele.rpt
ftp://ftp.informatics.jax.org/pub/reports/MGI_QTLAllele.rpt
ftp://ftp.informatics.jax.org/pub/reports/MRK_Reference.rpt

these stats will give us a sense if we've imported the data correctly:
http://www.informatics.jax.org/mgihome/homepages/stats/all_stats.shtml#allstats_pheno

NIF has access to the MGI db directly, so we can import necessary tables, and build the geno-pheno and strain-geno-allele tables we need.