fix numbering for tutorials page
DOC PR means pull request

In response to #1882.
FIX BytesIO and urllib usage in fetch_olivetti_faces

Fixes #1872.
Update hmm.rst

Should use model2.predict(X) instead of model.predict(X).  The predicted states, though, will have a different sort order than the generating model.
Add bit more instruction on writing docs
big O/tilde add in
removed old complexity info
DOC: remove typo
image and html file added
link fixes
add further links
last links fixed
jquerys added
FIX gen_rst.py was something using an undefined variable
intigrated to tutorial index
update tutorial page
make links relative
rename image/html
add instructions for editing Readme, and script needed for that
Merge pull request #1886 from NelleV/DOX_fix

FIX gen_rst.py was something using an undefined variable