toaster: clone Simple UI as base for Toaster GUI

This patch clones the Simple UI to provide the base code for
the development of the Toaster GUI. The clone takes the place
of the application that was reserved for Javascript MVC code.

The templates used for Simple UI are renamed to start with
an "simple_" to prevent name resolution conflict with the
Toaster GUI templates.

Minor changes are made to the settings.py and urls.py in the
toaster main section to account for the newly enabled application.

Signed-off-by: Alexandru DAMIAN <alexandru.damian@intel.com>
toaster: update static media for Toaster GUI

In the process of making the GUI more usable, we
bring in the static assets used during the design
phase into the application.

Licenses used:

    Bootstrap 2.3.2 under Apache License 2.0
    Font Awesome under SIL OFL 1.1 (GPL compatible) and MIT licence
    GLYPHICONS Halflings released with Bootstrap, CC BY 3.0
    jQuery 2.0.3 under MIT licence
    prettify.js under Apache Licence 2.0

Signed-off-by: Alexandru DAMIAN <alexandru.damian@intel.com>
toaster: Create the base page navigation structure

Updating the general container pages to use the graphical
design and features from the design phase.

In the process of adapting the Simple UI to the designed
interface, we create all the pages and the navigation
structure for the Toaster GUI.

Views for each page have been added, and the url mapping
has been updated to reflect newly added pages.

The table page has been refactored to be component-oriented
instead of class-oriented in order to facilitate reusage.

Changes are made in different layers of the template
(base, basetable) in order to maximize code reuse among
different pages in the build.

Signed-off-by: Alexandru DAMIAN <alexandru.damian@intel.com>
toaster: Build dashboard implementation

This patch adds the build dashboard page implementation,
which is the landing page for the Toaster GUI.

Also adds correct links from the main build page
to the various parts of the dashboard.

    [YOCTO #4258]

Signed-off-by: Alexandru DAMIAN <alexandru.damian@intel.com>
toaster: Toaster GUI, generic search, filter and order

This patch implements table searching, filtering and ordering, in a
generic mode reusable for all tables.

The search operates list of fields defined in the corresponding
class for each model, search_allowed_fields.

The search expression and filters are sent through GET requests
using a QuerySet-like input. The inputs are filtered and
validated before usage to prevent inadvertent or malicious use.

Filters and table headers are defined in the views for each table,
and rendered by generic code which is easily modified for various
tables.

The Build table and Configuration table are implemented using this
framework as an example of how it should be used.

    [YOCTO #4249]
    [YOCTO #4254]
    [YOCTO #4255]
    [YOCTO #4256]
    [YOCTO #4257]
    [YOCTO #4259]
    [YOCTO #4260]

Signed-off-by: Alexandru DAMIAN <alexandru.damian@intel.com>