DOC: Add missing notes to ChangeLog.md
DOC: Add note on scikit-bio to installation docs
DOC; More scikit-bio

        __________
     .'`   |     |`'.
     |     '-----'  |
     |  scikit-bio  |
     |  .--------.  |
     |  |--------|  |
     |  |--------|  |
     |  |--------|  |
     |  ;--------;  |
 jgs |__:________:__|

http://www.geocities.com/spunk1111/computer.htm
Merge pull request #265 from ElDeveloper/changelog-notes

Add documentation updates