Merge pull request #6 from gkthiruvathukal/master

moved .hgignore to .gitignore
All the rst changes since Oct 2
tweaking and adding exercises and examples up through
the decisions chapter mostly.
added cartesian image and ifnested and reviewcontext sections
mv buggy ios rst -> rst.txt, remove 51 warnings
fixed source references, now to github
Merge pull request #7 from anharrington/master

all my recent work and setting up source lookup on github
Removed hard-wired assumption about _static/bootswatch* in cssFix.py (now driven by cssFix.sh)

Signed-off-by: George K. Thiruvathukal <thiruvathukal@gmail.com>