Add summary to cmake run log
Summary:
Also
- require cmake 3.0 as elsewhere in kdev world
- mark ItemModels for future removal
- check for cargo as runtime dep
- use module specific KDEV_CARGO id for logged debugging
Reviewers: mihac, kfunk
Reviewed By: mihac, kfunk
Subscribers: kfunk, kdevelop-devel
Differential Revision: https://phabricator.kde.org/D9306