Fixed bg image name
* Made big project restructure. All page resources are now under /public
* Did some small style changes.
  ` Background is set to fixed.
  ` Added background to navbar.
  ` Added catalog button to navbar.
Add json DB files with current data
* Created new AngularJS structure
  - separated main module and controllers module
  - created service module that reads data from json files under
    /public/js/app/db/ directory