Fixed ERRAI-783: ServerSecurityRoleInterceptor needs default no-arg constructor
Move Validator log statement so that it is only printed when the validator is being generated.
Only calculate hashContent for reloadable classes.
Fixed ERRAI-788: Style classes in Errai UI templates are not applied in IE8
Fixed ERRAI-789: Translation bundle scanner fails for directories that contain spaces
Added groups to errai-security user

- Groups do not have any semantics in Errai. By default, Errai relies on roles only when checking for permissions.
- Groups were introduced to allow for more customization use cases
Made errai security user injectable
Fixed Todo-list demo: @Inject binder instead of @Model for user
Fixed ERRAI-790: Errai UI fails for templated static nested classes
Corrected missing case: @Bound can apply to Element as well as Widget
Annotation processors now support property attribute on @Bound