Initial checkin of WebVTT sample application.

Cleaned up the lint warnings while I was at it.

AdRulesIMASampleApp/src/main/AndroidManifest.xml
BasicAdobePassWebViewSampleApp/src/main/AndroidManifest.xml
BasicBundledVideoSampleApp/src/main/AndroidManifest.xml
BasicFreeWheelSampleApp/src/main/AndroidManifest.xml
BasicIMASampleApp/src/main/AndroidManifest.xml
BasicIMAWidevineSampleApp/src/main/AndroidManifest.xml
BasicOmnitureSampleApp/src/main/AndroidManifest.xml
BasicWidevineSampleApp/src/main/AndroidManifest.xml
HLSPlayerSampleApp/src/main/AndroidManifest.xml

  * Removed the <uses-sdk> element, because the values are being set
    via gradle.

AdRulesIMASampleApp/src/main/res/layout/ima_activity_main.xml
BasicAISWebViewSampleApp/src/main/res/layout/ais_activity_main.xml
BasicAISWebViewSampleApp/src/main/res/layout/ais_webview_activity_main.xml
BasicAdobePassWebViewSampleApp/src/main/res/layout/adobepass_activity_main.xml
BasicAdobePassWebViewSampleApp/src/main/res/layout/adobepass_webview_activity_main.xml
BasicBundledVideoSampleApp/src/main/res/layout/bundled_video_activity_main.xml
BasicFreeWheelSampleApp/src/main/res/layout/freewheel_activity_main.xml
BasicIMASampleApp/src/main/res/layout/ima_activity_main.xml
BasicIMAWidevineSampleApp/src/main/res/layout/ima_widevine_activity_main.xml
BasicOmnitureSampleApp/src/main/res/layout/omniture_activity_main.xml
BasicWidevineSampleApp/src/main/res/layout/basic_widevine.xml
HLSPlayerSampleApp/src/main/res/layout/activity_main.xml

  * Replaced top level tag with <merge> as per Android best practices.

BasicBundledVideoSampleApp/src/main/java/com/brightcove/samples/android/bundledvideo/basic/MainActivity.java

  * Removed unused TAG constant.  This change can be reverted if we add some logging.

BasicFreeWheelSampleApp/build.gradle
BasicOmnitureSampleApp/build.gradle

  * Added "@aar" to end of dependency, so the legacy jar isn't used.

BasicWidevineSampleApp/src/main/res/values-w820dp/dimens.xml

  * Not used.

WebVTTSampleApp/build.gradle
WebVTTSampleApp/src/main/AndroidManifest.xml
WebVTTSampleApp/src/main/ic_launcher-web.png
WebVTTSampleApp/src/main/java/com/brightcove/player/samples/webvtt/MainActivity.java
WebVTTSampleApp/src/main/res/drawable-hdpi/ic_launcher.png
WebVTTSampleApp/src/main/res/drawable-mdpi/ic_launcher.png
WebVTTSampleApp/src/main/res/drawable-xhdpi/ic_launcher.png
WebVTTSampleApp/src/main/res/drawable-xxhdpi/ic_launcher.png
WebVTTSampleApp/src/main/res/layout/activity_main.xml
WebVTTSampleApp/src/main/res/raw/sintel_trailer.m4v
WebVTTSampleApp/src/main/res/raw/sintel_trailer_de.vtt
WebVTTSampleApp/src/main/res/raw/sintel_trailer_en.vtt
WebVTTSampleApp/src/main/res/raw/sintel_trailer_es.vtt
WebVTTSampleApp/src/main/res/raw/sintel_trailer_fr.vtt
WebVTTSampleApp/src/main/res/raw/sintel_trailer_it.vtt
WebVTTSampleApp/src/main/res/raw/sintel_trailer_nl.vtt
WebVTTSampleApp/src/main/res/values-v11/styles.xml
WebVTTSampleApp/src/main/res/values-v14/styles.xml
WebVTTSampleApp/src/main/res/values/strings.xml
WebVTTSampleApp/src/main/res/values/styles.xml

  * Initial checkin.

build.gradle

  * Added "@aar" to end of android-native-player dependencies to the
    legacy jars are not used.

  * Bumped up the targetSdkVersion to 19.

  * Added mavenLocal() to the reposititories to add local development
    and changed from docs.brightcove.com repo to
    solutions.brightcove.com repo.

gradle.properties

  * Changed anpVersion to 4.+ in anticipation of first 4.1 release.

  * Added runWebVTTSampleApp flag.

settings.gradle

  * Added runWebVTTSampleApp logic.