feat(file-opener): add file opener support (#497)

closes #295

src/plugins/file-opener.ts

@@ -0,0 +1,54 @@
+import {Plugin, Cordova} from './plugin';
+/**
+ * @name FileOpener
+ * @description
+ * This plugin will open a file on your device file system with its default application.
+ *
+ * @usage
+ * ```
+ * import {FileOpener} from 'ionic-native';
+ *
+ *
+ *
+ * ```
+ */
+@Plugin({
+  plugin: 'cordova-plugin-file-opener2',
+  pluginRef: 'cordova.plugins.fileOpener2',
+  repo: 'https://github.com/pwlin/cordova-plugin-file-opener2'
+})
+export class FileOpener {
+  /**
+   * Open an file
+   * @param filePath {string} File Path
+   * @param fileMIMEType {string} File MIME Type
+   */
+  @Cordova({
+    callbackStyle: 'object',
+    successName: 'success',
+    errorName: 'error'
+  })
+  static open(filePath: string, fileMIMEType: string): Promise<any> {return; }
+
+  /**
+   * Uninstalls a package
+   * @param packageId {string}  Package ID
+   */
+  @Cordova({
+    callbackStyle: 'object',
+    successName: 'success',
+    errorName: 'error'
+  })
+  static uninstall(packageId: string): Promise<any> {return; }
+
+  /**
+   * Check if an app is already installed
+   * @param packageId {string} Package ID
+   */
+  @Cordova({
+    callbackStyle: 'object',
+    successName: 'success',
+    errorName: 'error'
+  })
+  static appIsInstalled(packageId: string): Promise<any> {return; }
+}