C++11/CMake 2.8 stable version

For the people on RHEL 7 and CENTOS 7, or similar long living systems.
This is a tag for the years old stable version, that requires only C++11 and builds with cmake 2.8.11. This state has been stable now for some years, therefore it is now preserved.
If there are bugfixes required, they will happen in the 1.x branch , so this version will still be maintained for some years, but master branch will now move on.

This version has been tested with, and includes, sqlite 3.31.1, but works also with other sqlite versions