Add blanket.js coverage testing to javascript tests
Merge pull request #205 from tarmstrong/blanket

Add blanket.js coverage testing to javascript tests
Add requirements-dev.txt.
Add note about requirements-dev.txt
disable automatic save
fix tests
Merge pull request #207 from bsplay/notebook_save_fix

disable automatic save
Merge pull request #208 from Shurouq/master

change UI color for nbmerge & nbdiff
add cell border for diff UI
fix bars width