BK-986 Create new Books page
BK-1030 Create new Dashboard page
Merge branch '2.0' of https://github.com/sourcefabric/Booktype into 2.0
BK-1034 Add group image
Merge branch 'BK1030' into 2.0
Merge branch 'BK986' into 2.0
BK-1032 Fails when two groups have the same name
BK-1032 Fails when two groups have the same name