Cleaning up flow summary, build system and JS source tree, UI updates

Lots of changes here. Highlights:

 * Disable Bootstrap responsiveness so that page layout doesn't get messed up when browser window is made smaller.
 * Colorize flow status on executing flow page.
 * Major Flow Summary clean-up.
 * Restructure JavaScript files into separate directories for views, models, and utils.
 * Redesign project list on main page.