title: Error While Adding library for CardView
body: <p>When i am adding the library for CardView ("compile 'com.android.support:cardview-v7:25.3.1'") in my build.gradle ( Module : app ) file it is showing me error</p>
  
  <p>Please help me in this !!</p>
  
  <pre><code>apply plugin: 'com.android.application'
  
  android {
      compileSdkVersion 26
      buildToolsVersion "27.0.3"
      defaultConfig {
          applicationId "in.trysafe.trysafecfs"
          minSdkVersion 14
          targetSdkVersion 26
          versionCode 1
          versionName "1.0"
          testInstrumentationRunner 
   "android.support.test.runner.AndroidJUnitRunner"
      }
      buildTypes {
          release {
              minifyEnabled false
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 
   'proguard-rules.pro'
          }
      }
  }
  
  dependencies {
      compile fileTree(dir: 'libs', include: ['*.jar'])
      androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
          exclude group: 'com.android.support', module: 'support-annotations'
      })
  
      compile 'com.android.support:appcompat-v7:26.+'
      compile 'com.android.support:design:26.+'
      compile 'com.android.support.constraint:constraint-layout:1.0.2'
      compile 'com.android.support:cardview-v7:25.3.1'
      compile 'com.google.firebase:firebase-core:10.0.1'
      compile 'com.squareup.picasso:picasso:2.5.2'
      compile 'com.squareup.retrofit2:retrofit:2.3.0'
      compile 'com.squareup.retrofit2:converter-gson:2.3.0'
      testCompile 'junit:junit:4.12'
  }
  apply plugin: 'com.google.gms.google-services'
  </code></pre>
  
  <p>it is showing me this error:</p>
  
  <pre><code>Error:Execution failed for task ':app:processDebugManifest'.
  &gt; Manifest merger failed : Attribute meta-data#android.support.VERSION@value 
  value=(26.0.0-alpha1) from [com.android.support:design:26.0.0-alpha1] 
  AndroidManifest.xml:27:9-38
      is also present at [com.android.support:cardview-v7:25.3.1] 
  AndroidManifest.xml:24:9-31 value=(25.3.1).
      Suggestion: add 'tools:replace="android:value"' to &lt;meta-data&gt; element at 
  AndroidManifest.xml:25:5-27:41 to override.
  </code></pre>