Addde list of Groups
Changed font-size of index to 0.8em, and adjusted the place off the index.
Change the template of index page, add index, logo; deleted iviwer icons, simplified the css folder structure.
Changed icons on the toolbar to match the theme, added the icon of 'show the original size of the picture'
Misoperating while previous commit.
Fixed the problem of loading the wrong css file after modified the css structure
Changed the height of the content area to the full height of the screen.
merged new version
Changed the icon of zoom-in and zoom-out