Bug 427399 - [Shell] Provide an Orion Node shell based on tty.js/term.js

Moved Clear Local Storage plugin (not default)

Removed as a default plugin; can be installed from settings page.
Currently hosted at
  http://www.columbia.edu/~kjh2141/orion/clearLocalStoragePlugin.html
Might migrate to Orion codebase.

Signed-off-by: Kaitlin Huben <kaitlin.huben@gmail.com>