Changeset [74d04845e5d92fe03e3b574153a747b38a8dc900] by Colin

Add support for VCF type tracks to the REST store by creating a stub getVCFHeader function. This fixes errors that occur when the VCF track is initializing because it uses info from the header to populate menu items. Note: We still don't support getting these types of features from the REST store (filters that are built into VCF that say if a feature passed a threshold)
https://github.com/GMOD/jbrowse/commit/74d04845e5d92fe03e3b574153a7...