Cheating slightly by hardcoding return value for Rickshaw

“this._slice is not a function” issue. I took it out and replaced it
with what it’s supposed to return (i.e. true) IT WORKS.
Some improvements on the JS.
Embedded mockup of the New Query feature
Prettier button for "Add new query"
Merge pull request #1 from williecheong/staging

Merging into production.