New SLF4J logger log4s. ANSI colors

Used jANSI for Windows console color support. Log4s for a Scala logging
facade (which uses SLF4J). Using logback as the logging driver.

common/src/test/scala/GamePacketTest.scala

@@ -59,7 +59,7 @@ class GamePacketTest extends Specification {
 
         val pkt = PacketCoding.EncodePacket(msg).require.toByteVector
 
-        println(pkt)
+        //println(pkt)
 
         true mustEqual true
       }