title: Has no exported member 'MdCardModule' and 'MdTooltipModule'
body: <h2>When I run <code>ng build</code> It shows some errors:</h2>
  
  <blockquote>
    <p>ERROR in C:/761/search-
    bar/workload_management_app/Client/src/app/app.module.ts (8,9):
    Module '"C:/761/search-
        bar/workload_management_app/Client/node_modules/@angular/materia
        l/material"' has no exported member 'MdCardModule'. </p>
    
    <p>ERROR in C:/761/search-
        bar/workload_management_app/Client/src/app/app.module.ts (8,23):
        Module '"C:/761/search-
        bar/workload_management_app/Client/node_modules/@angular/material/material"' 
        has no exported member 'MdTooltipModule'.</p>
    
    <p>ERROR in MdCardModule is not an NgModule</p>
    
    <p>ERROR in C:/761/search-
        bar/workload_management_app/Client/src/app/app.module.ts (8,9): Module 
        '"C:/761/search-
        bar/workload_management_app/Client/node_modules/@angular/material/materia
        l"' has no exported member 'MdCardModule'.</p>
    
    <p>ERROR in C:/761/search-
        bar/workload_management_app/Client/src/app/app.module.ts (8,23): Module 
        '"C:/761/search-
        bar/workload_management_app/Client/node_modules/@angular/material/materi
    al"' has no exported member 'MdTooltipModule'.</p>
  </blockquote>
  
  <h2>package.json</h2>
  
  <pre><code>  "version": "0.0.0",
  ...
    "private": true,
    "dependencies": {
      "@angular/animations": "^4.2.4",
      "@angular/cdk": "^2.0.0-beta.11",
      "@angular/common": "^4.2.4",
      "@angular/compiler": "^4.2.4",
      "@angular/core": "^4.2.4",
      "@angular/forms": "^4.2.4",
      "@angular/http": "^4.2.4",
      "@angular/material": "github:angular/material2-builds",
      "@angular/platform-browser": "^4.2.4",
      "@angular/platform-browser-dynamic": "^4.2.4",
      "@angular/router": "^4.2.4",
      "@ng-bootstrap/ng-bootstrap": "^1.0.0-beta.2",
      "angular-numeric-directive": "^1.0.0",
      "angular2-busy": "^2.0.4",
      "bootstrap": "^4.0.0-beta",
      "core-js": "^2.4.1",
      "jquery": "^3.2.1",
      "ng2-drag-drop": "^2.6.0",
      "ng2-dragula": "^1.5.0",
      "ngx-bootstrap": "^1.9.3",
      "popper.js": "^1.12.5",
      "rxjs": "^5.4.2",
      "zone.js": "^0.8.14"
  </code></pre>
  
  <h3>How can I solve this problem, could anyone help me?</h3>
  
  <blockquote>
    <p>PS: I tried to run <code>npm install --save @angular/material</code> before, but it didn't work.</p>
  </blockquote>