Added support for R GlobalTest.
Slightly reworked folder structure.
Small cleanup
Added field_select generic input for ng-based UI, so MSigDB block now finished.
Removed redundant code in workflow.blocks.PCA_visulalise
Removed unused property GenericBlock.type
Fixed issues with GeneSets provider block
Added block which merge Broad Institute gene sets with platform annotation. It produces gene sets with PROBE_ID as units.
Refactored workflow/blocks.py into package workflow/blocks
Started working on Execution Supervisor
Added GlobalTest block. Works directly with R package globaltest with miXGENE R-wrapper.