New Creation Flow: issue290-3

NOTES:

1) Some of the new files (ExperimentCreationPublishingPanel, ExperimentMetadataPanel) have large portions that are simply copy/paste from ExperimentDefinitionPanel, so please look in ExperimentDefinitionPanel for reference.

2) After the code review, I will rename:
    ExperimentDescriptionPanel --> ExperimentOverviewPanel
    ExperimentDefinitionPanel --> ExperientCreationPanel
    ExperimentMetadataPanel --> ExperimentDescriptionPanel
  (but I wanted to wait so that git wouldn't show the files as being completely new).

3) I apologize for the multiple commits.  I had an issue with properly rebasing because I pulled from develop.