Release note v16.0

------------------
### Features
 * Advanced Employee Management Module is now included in IceHrm Open Source Edition
 * LDAP Module which was only available in IceHrm Enterprise is now included in open source also
 * Initial implementation of icehrm REST Api for reading employee details
 * Improvements to data filtering
 * Multiple tabs for settings module
 * Overtime reports - now its possible to calculate overtime for employees.compatible with US overtime rules
 * Logout the user if tried accessing an unauthorized module
 * Setting for updating module names

### Fixes
 * Fix issue: classes should be loaded even the module is disabled
 * Deleting the only Admin user is not allowed
 * Fixes for handling non UTF-8
 * Fix for non-mandatory select boxes are shown as mandatory

ext/admin/charts/api/ChartsAdminManager.php

@@ -0,0 +1,22 @@
+<?php
+if (!class_exists('ChartsAdminManager')) {
+	class ChartsAdminManager extends AbstractModuleManager{
+		
+		public function initializeUserClasses(){
+			
+		}
+		
+		public function initializeFieldMappings(){
+	
+		}
+		
+		public function initializeDatabaseErrorMappings(){
+			
+		}
+		
+		public function setupModuleClassDefinitions(){
+
+		}
+		
+	}
+}