Bump version to 1.2.0

Upgrade version to v1.1.0

Bump version to 1.0.0.

Set version to 0.8.1.

Add tests.

Add Visual Studio 2017 in AppVeyor CI.

Add installation rules in the CMake of the project (#22)

Update README.md. Fix example.

Add support for large maps/sets (more than 2^32 - 1 elements) through…

… an extra class template parameter (#18)

Reduce default max load factor to 0.75.