Started to update mySobek views and fixed Add Volume logic

- Cleaned HTML to HTML5, move to CSS3, reduce javascript, etc..
  - Added new SobekCM_MySobek.css and sobek_mysobek.js
  - Delete_Item_MySobekViewer
  - Logon_MySobekViewer
    - Also fixed error message not showing problem
    - Remember me is now a label for better UI experience
- Group_Add_Volume_MySobekViewer now correctly clears more elements from base VID
  - PURL
  - Main thumbnail
  - METS Header creator notes
  - Create and Modify date now set to todays date
  - METS Header creator individual/software now set
  - Message in software creator tells which VID this was derived from
- Multiple_Volumes_Item_Viewer
  - Corrected issue where DARK items appeared as private in the list view
  - Corrected DARK items without serial hierarchy not reflecting dark in the tree view
- Corrected problem that a user could not UNRESTRICT an item correctly, even when they had the rights to do so