Fauxtin: Remove Todo, clean up readme

We haven't used todo.md in a long time. All the tickets are in JIRA.
I've just removed some old wording from the readme.md
Fauxton: add missing closing tags
Fauxton: Inject database into view

it's handled in the options and used, but was never passed
Fauxton: Implement bulk deletion for all-docs-listing

Introduce a collection which keeps track of documents that will
deleted using the CouchDB Bulk-update API.

The collection fires events, so the view is noticed.

Closes COUCHDB-2153
Fauxton: Show design doc name in status dashboard for indexer

Using a custom objectField that consists of the database name and
the design document name when the type of the task is indexer in the
status dashboard.

Closes COUCHDB-2222
Fauxton: Remove dead code/view: database sidebar
Fauxton: use local version of font awesome

We are currently referencing to Font-Awesome on a CDN in the
variables.less, which is basically nice, but some users of
CouchDB are firewalled at work and can just use the local
network.

Additionally offline people without internet can't use Fauxton
if the font is loaded via CDN.

This also removes the cache-buster for imgs (GET-Params with
version) in our routing for the local files of the dev-server
to make it work, in the future we might want to use a real
router module for the long if/else block.

Closes: COUCHDB-2238
Add Experimental Content-Security-Policy-Support (CSP) for Fauxton

Like every web application, Fauxton is vulnerable against XSS
and CSP is a technology that tries to help against that.

The patch makes it possible to enable CSP for the /_utils path
and allows configuration of the sent header.

The default setting for the value of the header breaks the old
Futon, when CSP is enabled there. The old Futon has alot of
inline-JavaScript which is not allowed in the setting I have
chosen as default.

For development, the header is also sent from the node server
which launches Fauxton in dev-mode.
shorter custom test
review: config value default to false
review: reference to self for img-src
Review: use faster concat
review: no need to join here
add docs
remove "
restrict font-src to self