Added OpenCV references and initialization code.

AndroidManifest.xml

@@ -14,6 +14,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
 -->
+<!-- android:screenOrientation="portrait" -->
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="ve.ucv.ciens.ccg.nxtar"
     android:versionCode="1"
@@ -37,7 +38,6 @@
         <activity
             android:name=".MainActivity"
             android:label="@string/app_name"
-            android:screenOrientation="portrait"
             android:configChanges="keyboard|keyboardHidden|orientation|screenSize">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />