Create @Controller, @Widget, @Service, @Provider decorators

[bartekn]

Think about how to create:

• @Controller decorator to annotate controller classes,
• @Widget decorator to annotate widget directives,
• @Service decorator to annotate service classes,
• @Provider decorator to annotate provider classes.

The best way to do it would be without a use of any kind of preprocessors. We need this to get rid of:

module.exports = function(mod) {
  mod.directive("directiveName", directiveWidget);
};

lines.

[bartekn]

Idea: @Widget decorator could be used to annotate widget's controller. Widget directive then could be created automatically.