Basic support of new deferreds (v1.0)

 - decorator renaming done.
 - `info` handler now properly returns from its function.
Other pack of rewritten tools with supporting new deferreds (v1.0).

 - View actions.
 - Restart action.
 - Call action.
 - Crashlog view and status actions.
Merge branch 'feature-SupportNewDeferreds' into develop