Move MAGMA, LAVA, ldblock to comorment/magma repo

[ofrei]

Fixes #54

Changes proposed in this pull request:

• MAGMA, LAVA and ldblock software is moved to https://github.com/comorment/magma. MAGMA reference files are also moved to this repository.
• unit-tests are implemented in https://github.com/comorment/magma , and they are working just fine. Update Dockerfile and a newly build .sif file is also included in that repo. The new repo still needs better documentation, but this I can address later.

Before submitting

• I've read and followed all steps in the Making a pull request
  section of the CONTRIBUTING docs.
• I've updated or added any relevant docstrings following the syntax described in the
  Writing docstrings section of the CONTRIBUTING docs.
• If this PR fixes a bug, I've added a test that will fail without my fix.
• If this PR adds a new feature, I've added tests that sufficiently cover my new functionality.

[espenhgn]

Looks good! Just go ahead with the merge.