MAINT: updated notebook names for better display in TOC
Merge branch 'master' of github.com:biocore/scikit-bio-cookbook into toc-updates
MAINT: removed title cells from notebooks as titles are now in the header section
MAINT: removed version string after discussion with @jairideout
BUG: added back missing file extension
MAINT: addressed comments from @jairideout
Merge pull request #42 from gregcaporaso/toc-updates

updated notebook titles and auto-generated the TOC