Clinical data: give numeric values as BigDecimals

This avoids unnecessary conversions from BigDecimal to String and then
to BigDecimal again when those values need to be processed as numbers
(for instance, for binning).
Merge pull request #6 from thehyve/clinical_numeric_as_bigdec

Clinical data: give numeric values as BigDecimals
[UAT-89] Add one to many join table for mapping RBM data to annotation
Add test case for antigenes that relates to several proteins
Merge pull request #7 from thehyve/issues/uat-89-rbm-analyte-as-id

Add one-to-many join table for RBM data to annotation

Related: UAT-89.
Add more checks to test case

Rbm data-annotation one to many relation test case
Merge master into features/234-add-metabolomics
ws
Add support for sub/superpathways