function toBoolean(val) {
						if (typeof val === 'string') {
							val = val.toLowerCase();
							return val == 'yes' || val == 'true' || val == '1';
						}

						return !!val;
					}
Common module's preferences storage. This module 
provides general storage for all module preferences, their description and
default values.<br><br>

This module can also be used to list all available properties to create 
UI for updating properties