fix Issue #351 by checking if plugin exists before accessing its password.
add braces for style conformation
Merge pull request #352 from twosigma/fix351

fix Issue #351 by checking if plugin exists before accessing its passwor...
Add tick event sending to ga track
Fix #344, when sending ga 'tick' event, include the required action param
Merge pull request #355 from twosigma/alee/fix-344

Fix #314, Add tick event sending to ga track
Move code-cell behaviors according to design

Implements a basic version of the codecell styling
that does not remove any functionality however brings it closer
inline with the implemented design.
Remove side click behavior from codecells
Move right cell menu according to new design.
Add a test for showing the codecell menu
Test toggling a code cells visibility
Move cell menu items into top level header
Update style of the new cell indicator.
Test expanding the newCell menu
Update dropdown menu styles.
Update new app header styles.
Add a compile task for scss
Replace app.css with app.scss
Add a watch task for dev
Split up styles into modules