Descriptive text on home page that prompts user to register or login
For issue #4

Including dwc class label to the right of the workflow list entries

Added html and css for filtering ui components to workflows list page

Finishing up consolidation of workflows via config as part of filtering
The consolidated workflow "Run With" buttons now work with the back end runner code.

Minor fix to the status labels for shared runs
All status labels for the shared runs were displayed as "COMPLETE" regardless of actual status. Changed labels to match status.

Using the new configuration to render forms for consolidated workflows
Combined workflows with "alternatives" in the list ui and added Run with" buttons for each input type instead (e.g. CSV File, DwCA URL). Also created a form definition model object and used it when rendering the ui forms from the new config.

Minor fix to the georeference validator documentation link in config

Minor fixes to the UI list display of workflows in the web app

Updating the json response for the list workflows controller endpoint
To support the new configuration for filtering of workflows.

Merge remote-tracking branch 'origin/master'

Dynamic properties parser workflow config missing dwc class
Web app config requires a dwc class value for the filtering feature.

Updated native python actor logging and error handling
Improved logging and error messages when the native actor fails to initialize.