Add building instructions to README
diff --git a/README.md b/README.md
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-# Android M-Pin SDK
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+# Android M-Pin SDK
+
+## Building the M-Pin Mobile SDK for Android
+
+### Prerequisites
+
+1. Download and install Android Studio or higher with Android SDK 16 or higher
+1. Download or Clone the project and its submodule to \<mpin-sdk-android\>
+
+### Building the M-Pin Mobile SDK
+
+#### From Android Studio
+1. Import the project - File-> Open -> \<mpin-sdk-android\>
+1. From Gradle Tool View select :mpinsdk -> Tasks -> build -> build
+1. The assembled aars will be located in \<mpin-sdk-android\>/mpinsdk/build/outputs/aar
+
+#### From Command Line
+1. Navigate to \<mpin-sdk-android\>
+1. Execute ./gradlew build
+1. The assembled aars will be located in \<mpin-sdk-android\>/mpinsdk/build/outputs/aar
+
+For further details, see [M-Pin Mobile SDK for Android Online Help](http://docs.miracl.com/m-pin-mobile-sdk-for-android)
