admin-ui: Update icon-font

More icons are added and the support for ie7 is removed.
admin-ui: Add sign out icon
admin-ui: Update the columns that the server sends

Remove first (hidden) column, "Details" and "Summary".
The last column now sends for header an empty string.
admin-ui: Update the layout of the tables

Now, in the last there are 2 icons.
One of them is a link that takes you to the details page.
The other on click expands the summary area.
admin-ui: Fix minor style bugs
admin-ui: Make the buttons of the table visible on tr:hover

Fix apyrgio/synnefo#67
admin-ui: Overall style modifications
Merge branch 'feature-admin-ui-new' into feature-admin