Version 0.7

Compared with the last release, the most important change is the C interface and CMake building system contributed by @jschueller .

In addition, we can now input the commit hash when manually invoking a workflow. This is instrumental when we want to re-produce the result of a previous run. Note, however, that we have to make sure that the runner has the same status as before in order to reproduce the result. This may not be the case if we use actions like free-disk-space in the workflow now but not before. See b25e404 and jlumbroso/free-disk-space#12.

pl in the Fortran implementation of UOBYQA is changed to an allocatable array.