Merge branch '55-update-readme-and-add-cla-for-release' into 'master'

Resolve "Update Readme and Add CLA for release"

Closes #55

See merge request chase/chase-library/ChASE!74

Merge branch '41-implement-ci-for-unitests' into 'master'

Resolve "Implement CI for unitests"

Closes #41

See merge request chase/chase-library/ChASE!62

Merge branch '20-gpu-timing' into 'master'

Resolve "GPU - timing"

Closes #20

See merge request chase/chase-library/ChASE!43

remove unused print

ChASE version v1.3.1

Major release

Minor release

Merge branch 'interfaceELSI' into 'master'

slightly improve the C/Fortran interface & remove dependencies on Nvtx tools in example2

See merge request SLai/ChASE!26

Merge branch 'q-e' into 'master'

fully compatible with quantum espresso now

See merge request SLai/ChASE!24

Update README.md