Remove duplicated notifications

The ones that are used are in index.underscore

COUCHDB-2471
Fix URL paths for Views to be _view not _views

This changes the URL paths for Views within Fauxton for compatibility
with the API URLs.To test, just create/edit a View and confirm the URL
ends with /_view/theViewName not _views/theViewName

Closes COUCHDB-2415
Move Helpers.docs into constants.js

This is a house cleaning ticket. It does a couple of things:
1. Moves the list of URLs stored in Helpers.docs into constants.js
2. Refactors constants to group the (now growing) list into appropriate
groups.

Now there are a lot less hardcoded "magic" strings throughout our
code, yay!

Closes COUCHDB-2474
Fix lookaheadTray

It wasn't showing up on click
Remove checkboxes from viewlist

The viewlist has no bulkdelete. If we want to add it as feature a
good point might be with the new header-controls.
Revert "Fix the flash on doc page route changes"

This reverts commit 84e6d87b2de671fff1ddeaffb02003ef2ffd0b09.
Styleguide update

Now mentions to always use this.$("...") within Backbone Views.
Refactor Nightwatch

This ticket makes a few changes to the way Nightwatch is set up:
1. the main Nightwatch settings (username, password, login URL, key
nightwatch setup file locations) are moved to the settings.json
file to allow them to be defined a single global place and overridden
if need be.
2. it now dynamically determines the list of tests to run based on
content of settings.json.
3. hardcoded username, password & URL moved from helpers.js and
loginToGUI.js and now loaded from settings.json file

Closes COUCHDB-2481
remove nightwatch.json

it keeps beeing changed
Fix lookaheadTray test

`baseUrl` was undefined
Update Nightwatch README file
verifyinstall addon whitespace and style fixes

Just a housekeeping ticket.
Fix broken testsuite

Remove shared url for db and Fauxton
Move db-url-construction to the settings.json

This enables us additionally to have the couch running on differnt
host to fauxton.