moved public data link to main menu in index page.
added route for private data page.
added menu for moving between pages.
Renamed account-controller->security, backend-mock->../scripts/backend-mock.js
Moved code from main.js to security.js. Corrosponding changes to index.html
Moved backend-mock back to app dir.
Added restricted attribute.
moved backend-mock inside app(virtual dir) dir.
reverted back to original.
Corrected controller name type. Added 'track by ' for array iteration to eliminate dulicate value error.
Corrected contorller name typo.
corrected name of the auth service.
Updated page redirection logic.
added information.