Added stable panels elements persistent.
Merge remote-tracking branch 'origin/master' into reka
Migrate from log4j to logback over slf4j.
Added sql execution plugin with roles and test_user dumps.
Change Form-builder
Updated sql executor - reading properties form file.
Changes in models: now Panel extends Element and can contain other
panels. 
CheckBox model deleted.
Added new sql file for inserting test data.
Changes in form-builder without refactoring...
Refactoring, added UserUtils class. Fix some bugs.
little refactiring form-Builder & fix dropdown rendering under the
subpanel.
fix problem with checkbox field.
Add text field for DropDown
Refactoring - deleted old sb-admin resources.
Integrated admin side with new template.
Merge remote-tracking branch 'origin/master' into reka

Conflicts:
	Immunology/src/main/java/com/immunology/logic/controller/AdminController.java