FIX mongoDriver to work with 2.6

- fixed handling of $unset property to be compatible with mongodb 2.6
Mongodb test empty unset collection
Security schemas
Security role list

Working sample.
Comparison oprators repaired
Vylistovanie Roly [Finished #71381946]
Schema editor fixed (index2.html)
[finished #71384326]
FIX TravisCI build failure

SecurityController test moved from unit to integration tests
as it depends on mongoDB.
Form layout

- add first version of form layout
- sass _variables.sccs - fix font sizes, colors
- add custom bootstrap
- add placeholder mixin
Inserted logo

-Inserted logo.
-Changed html - inserted <img> tag.
DEPLOY and DELIVERY commit http://registries-unionsoft.rhcloud.com/

[DELIVERED #71381946]
[DELIVERED #71384326]
[DELIVERED #72015940]
ObjectTools introduced

Helper module for manipulating objects introduced.
Support for src/shared structure

- build now includes src/shared directory structure
- this structure should be used for shared objects betweeen
client and server
$objectLink keyword compilation is schemas

SchemaTools now understand $objectLink keyword used for referencing
objects in between various registries.
[FIX #7] id property considered as schema identifier

Fixed id property in properties to not be considered as schema dientifier
Logger silenced in tests

Logger configured to not produce logging messages during tests by default.
[#71400240] Referencies between registries

$objectLink references are evaluated by SchemaTools and ObjectTools.

[FINISHED #71400240]
Added buttons in contenteditable.

-Added buttons:left, right, justify, h1, h2, h3, remove heading, undo,
redo
-Changed psui.css to fix problems with line height in h1, h2 and h3
Created favicon.

-Created favicon
-Changed html - added link tag