-implementation of "--send-key"

-implementation of "--sign-key"
-partial implementation of exchanging/verifying keys via QR Code

pom.xml

@@ -27,7 +27,12 @@
 			<artifactId>scprov-jdk15</artifactId>
 			<version>1.46.99.4-UNOFFICIAL-ROBERTO-RELEASE-SNAPSHOT</version>
 			<type>jar</type>
-			<scope>provided</scope>
+		</dependency>
+		<dependency>
+			<groupId>com.google.zxing</groupId>
+			<artifactId>android-integration</artifactId>
+			<version>1.6-SNAPSHOT</version>
+			<type>jar</type>
 		</dependency>
 	</dependencies>
 	<build>