warn if old class naming is used

client/src/app.js

@@ -406,6 +406,9 @@ Espo.define(
                 var path = null;
                 switch (type) {
                     case 'template':
+                        if (~name.indexOf('.')) {
+                            console.warn(name + ': template name should use slashes for a directory separator.');
+                        }
                         path = 'res/templates/' + name.split('.').join('/') + '.tpl';
                         break;
                     case 'layoutTemplate':

client/src/loader.js

@@ -185,6 +185,9 @@ var Espo = Espo || {classMap:{}};
 
         normalizeClassName: function (name) {
             var normalizedName = name;
+            if (~name.indexOf('.')) {
+                console.warn(name + ': class name should use slashes for a directory separator and hyphen format.');
+            }
             if (!!/[A-Z]/.exec(name[0])) {
                 if (name.indexOf(':') != -1) {
                     var arr = name.split(':');