datagraph checkForSubGraphs() fix
reordered cols in lit tab
fixed #504.  compare now does not make assumptions about type, but attempts to resolve ids using id prefixes.  gene comparisons are limited to NCBIGene identifiers.
made datagraph more generic, removed phenotype from object/variable
names, added config for yLabel linkouts
Merge remote-tracking branch 'origin/master'
Merge remote-tracking branch 'origin/master' into scigraph