[FIX] Fixing various compilation bugs.
Merge pull request #646 from holtgrewe/feature/fix-builds

[FIX] Fixing various compilation bugs.
[DOC] Cleaning up MSA tutorial and API documentation.
Merge pull request #649 from holtgrewe/feature/msa_docs

[DOC] Cleaning up MSA tutorial and API documentation.
[FIX] fixed POI problem