BK-1264 Control Center management for Roles
BK-1278 Profile box only visible on the Front page
Merge branch 'BK1278' into 2.0
BK-1276 Incorrect history entry is recorded in case of Section rename operation

Activity type was missing from the `ACTIVITY_KIND_VERBOSE` dict
Merge branch 'BK1276' into 2.0
BK-1277 Sections should not be nested inside of other Sections in the Table Of Contents
Merge branch '2.0' of git://github.com/sourcefabric/Booktype into 2.0