docs(apimock): add comments on serialization

Reference
https://github.com/seriema/angular-apimock/pull/49/files?diff=unified#r4
2324194

app/scripts/angular-apimock.js

@@ -125,19 +125,23 @@ angular.module('apiMock', [])
 
 			function serialize(toSerialize, prefix, topLevel) {
 				if (angular.isArray(toSerialize)) {
+					// Serialize arrays.
 					angular.forEach(toSerialize, function (value, index) {
 						serialize(value, prefix + '[' + (angular.isObject(value) ? index : '') + ']');
 					});
 				} else if (angular.isObject(toSerialize) && !angular.isDate(toSerialize)) {
+					// Serialize objects (not dates, because that's covered by the default case).
 					forEachSorted(toSerialize, function (value, key) {
 						serialize(value, prefix +
 						(topLevel ? '' : '[') +
 						key +
 						(topLevel ? '' : ']'));
 					});
 				} else if (toSerialize === undefined || toSerialize === '') {
+					// Keep empty parameters as it still affects the mock file path.
 					parts.push(encodeUriQuery(prefix));
 				} else {
+					// Serialize everything else (including dates).
 					parts.push(encodeUriQuery(prefix) + '=' + encodeUriQuery(serializeValue(toSerialize)));
 				}
 			}