title: ngx-permissions error with directive *ngxPermissionsOnly
body: <p>I have a problem with the directive of the library ngx-permissions.
  These are the versions of my angular's dependency:</p>
  
  <pre><code>    "@angular/animations": "^5.0.3",
      "@angular/common": "^5.0.3",
      "@angular/compiler": "^5.0.3",
      "@angular/core": "^5.0.3",
      "@angular/forms": "^5.0.3",
      "@angular/http": "^5.0.3",
      "@angular/platform-browser": "^5.0.3",
      "@angular/platform-browser-dynamic": "^5.0.3",
      "@angular/router": "^5.0.3",
  </code></pre>
  
  <p>And I am following <a href="https://github.com/AlexKhymenko/ngx-permissions#individual-roles" rel="nofollow noreferrer">this example</a>.</p>
  
  <p>I am using the version of module:</p>
  
  <pre><code>import { BrowserModule } from '@angular/platform-browser';
  import { NgModule } from '@angular/core';
  
  import { AppComponent } from './app.component';
  
  import { NgxPermissionsModule } from 'ngx-permissions';
  
  @NgModule({
    declarations: [
      AppComponent
    ],
    imports: [
      BrowserModule,
  
      // Specify your library as an import
       NgxPermissionsModule.forRoot()
    ],
    providers: [],
    bootstrap: [AppComponent]
  })
  export class AppModule { }
  </code></pre>
  
  <p>I can use the services without problem, but I have an error only with the directive.
  The error is the next:</p>
  
  <pre><code>Can't bind to 'ngxPermissionsOnly' since it isn't a known property of 'div'. ("
      &lt;/div&gt;
              &lt;/div&gt;
                  &lt;div [ERROR -&gt;]*ngxPermissionsOnly="['ADMIN', 'GUEST']" class="m-portlet__head-tools"&gt;
                      &lt;ul class="nav nav-pil"): ng:///DashboardModule/DashboardComponent.html@35:10
  Property binding ngxPermissionsOnly not used by any directive on an embedded template. Make sure that the property name is spelled correctly and all directives are listed in the "@NgModule.declarations". ("
                      &lt;/div&gt;
                  &lt;/div&gt;
                  [ERROR -&gt;]&lt;div *ngxPermissionsOnly="['ADMIN', 'GUEST']" class="m-portlet__head-tools"&gt;
                      &lt;ul class="nav na"): ng:///DashboardModule/DashboardComponent.html@35:5
  </code></pre>