Implemented Android Smart Card Emulator

Includes jCardSim to emulate the following Java Card Applets in
Android's host card emulation:

- jCardSim Team's Hello World Applet
- Philip Wendland's ISO Applet
- Yubico's OpenPGP Applet
- Yubico's OATH Applet

ACardEmulator/app/build.gradle

@@ -0,0 +1,34 @@
+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion 21
+    buildToolsVersion "21.1.2"
+
+    defaultConfig {
+        applicationId "com.vsmartcard.acardemulator"
+        minSdkVersion 19
+        targetSdkVersion 21
+        versionCode 1
+        versionName "1.0"
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+    sourceSets {
+        main.java.srcDirs += 'src/main/external/jcardsim/src/main/java'
+        main.java.exclude('**/APDUScriptTool.java')
+        main.java.srcDirs += 'src/main/external/IsoApplet/src'
+        main.java.srcDirs += 'src/main/external/android-scio/src/main'
+        main.java.srcDirs += 'src/main/external/ykneo-openpgp/applet/src'
+        main.java.srcDirs += 'src/main/external/ykneo-oath/applet/src'
+    }
+}
+
+dependencies {
+    compile fileTree(dir: 'libs', include: ['*.jar'])
+    compile 'com.android.support:appcompat-v7:21.0.3'
+    compile group: 'com.madgag.spongycastle', name: 'core', version: '1.51.0.0'
+}