Docs: Update Top-Level README
Update the top-level README:
- Add a section on cloning Octopus from Gitlab
- Acknowledge different tarballs for cmake and autotools
- Make the autotools information more compact
- Give a minimal MPI configuration command using cmake, which also highlights the need to specify
CMAKE_DISABLE_FIND_PACKAGE_METIS=On
to use the internal copy of metis - Make it explicit that tarballs do not contain git information, including submodules
- Update the list of external dependencies
This should close issue #1157 (closed)