Performance upgrades, more removal of old tabs/buttons

- Performance upgrades
   - Created a very small jquery ui version with only draggable
   - Minified the main SobekCM css as well (used in release mode only)
   - Merged SobekCM_Tabs.css into Main (tabs used in more places now)
- Removal of old tabs/buttons
   - Reworked the buttons and tabs for:
      - Edit_Group_Behaviors_MySobekViewer
      - Edit_Item_Behaviors_MySobekViewer
      - Group_Add_Volume_MySobekViewer
      - Mass_Update_Items-MySobekViewer
- Updated the skins and header/footer drawing to allow skin HTML to specify where the container should be placed (otherwise it wraps around the whole page)
- Pushed the selection of the CSS class for the container down into the HtmlSubWriters
- TO DO:
    - Push container class selectection down into the viewers for aggregation and item views
    - Remove the old tabs/buttons for editing an item's metadata
Merge branch 'master' of github.com:MarkVSullivan/SobekCM-Web-Application