Docker versioning instructions and close #254
Docker versioning instructions and close #254

Recent updates seem to have fixed the issue in #254, so I'm closing that and adding instructions for how to name new images discussed there.
weecology/portalPredictions,gmyenni/portalPredictions,weecology/portalPredictions,sdtaylor/portalPredictions,weecology/portalPredictions,gmyenni/portalPredictions,sdtaylor/portalPredictions,sdtaylor/portalPredictions,gmyenni/portalPredictions