Added missing libraries/*aars and updated LICENSE

Author: Sameer Padala

.gitignore

@@ -6,10 +6,11 @@
 .externalNativeBuild/
 .gradle/
 build/
-libraries/
+libraries/headers
+libraries/jni
 
 # User configuration.
 local.properties
 
 # OS configurations.
-.DS_Store
+.DS_Store

LICENSE

@@ -0,0 +1,6 @@
+The headers and the .so for the GVR NDK live inside the sdk-base.aar. Before
+compiling an NDK sample, the necessary code needs to be extracted from the aar
+into the /libraries directory. Depending on the build system used by your app
+you can copy this code or manually extract the headers and native libs.
+
+See the root build.gradle file for an example extractNdk task.

NOTICE

@@ -0,0 +1,25 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <groupId>com.google.vr</groupId>
+  <artifactId>sdk-audio</artifactId>
+  <version>1.190.0</version>
+  <packaging>aar</packaging>
+
+  <name>Google VR SDK-Audio</name>
+  <url>https://developers.google.com/vr/</url>
+
+  <properties>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+  </properties>
+
+  <dependencies>
+    <dependency>
+      <groupId>com.google.vr</groupId>
+      <artifactId>sdk-base</artifactId>
+      <type>aar</type>
+      <version>1.190.0</version>
+    </dependency>
+  </dependencies>
+</project>

libraries/README.md

@@ -0,0 +1,16 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <groupId>com.google.vr</groupId>
+  <artifactId>sdk-base</artifactId>
+  <version>1.190.0</version>
+  <packaging>aar</packaging>
+
+  <name>Google VR SDK-Base</name>
+  <url>https://developers.google.com/vr/</url>
+
+  <properties>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+  </properties>
+</project>