fix gradle, add missing cardview dependency

build.gradle

@@ -173,6 +173,7 @@ dependencies {
     compile "com.android.support:design:${supportLibraryVersion}"
     compile 'com.jakewharton:disklrucache:2.0.2'
     compile "com.android.support:appcompat-v7:${supportLibraryVersion}"
+    compile "com.android.support:cardview-v7:${supportLibraryVersion}"
     compile 'com.getbase:floatingactionbutton:1.10.1'
     compile 'com.google.code.findbugs:annotations:2.0.1'
     compile group: 'commons-io', name: 'commons-io', version: '2.4'