Merge remote-tracking branch 'origin/develop'

README.md

+Binary Classifier. 
+Takes vcf file and corresponding sample disease label as input.
+Depends on VariantSpark (https://github.com/aehrc/VariantSpark) for feature selection.
+So far only implemented with Spark ML GBT models for predicition of disease status.
+Spark 2.4.0
+Scala 2.11.0