adding gradle support for library project

HoloGraphLibrary/build.gradle

@@ -0,0 +1,34 @@
+buildscript {
+    repositories {
+        mavenCentral()
+    }
+    dependencies {
+        classpath 'com.android.tools.build:gradle:0.5.+'
+    }
+}
+
+apply plugin: 'android-library'
+
+android {
+    compileSdkVersion 17
+    buildToolsVersion = 17
+
+    sourceSets {
+
+        main {
+            assets.srcDirs       = ['assets']
+            res.srcDirs          = ['res']
+            aidl.srcDirs         = ['src']
+            resources.srcDirs    = ['src']
+            renderscript.srcDirs = ['src']
+            java.srcDirs         = ['src']
+            manifest.srcFile 'AndroidManifest.xml'
+
+        }
+    }
+}
+
+
+dependencies {
+    compile 'com.android.support:support-v4:18.0.+'
+}