fix case in search

src/groups.js

@@ -1147,6 +1147,8 @@ var async = require('async'),
 				return Groups.getMembers(data.groupName, 0, -1, callback);
 			}
 
+			query = query.toLowerCase();
+
 			async.waterfall([
 				function(next) {
 					Groups.getMembers(data.groupName, 0, -1, next);

src/user/search.js

@@ -77,6 +77,7 @@ module.exports = function(User) {
 		if (!query) {
 			return callback(null, []);
 		}
+		query = query.toLowerCase();
 		var min = query;
 		var max = query.substr(0, query.length - 1) + String.fromCharCode(query.charCodeAt(query.length - 1) + 1);