Increase version to 1.5.7

Author: marci4

build.gradle

@@ -10,7 +10,7 @@ repositories {
 }
 
 group = 'org.java-websocket'
-version = '1.5.6'
+version = '1.5.7-SNAPSHOT'
 sourceCompatibility = 1.7
 targetCompatibility = 1.7
 

pom.xml

@@ -5,7 +5,7 @@
     <groupId>org.java-websocket</groupId>
     <artifactId>Java-WebSocket</artifactId>
     <packaging>jar</packaging>
-    <version>1.5.6</version>
+    <version>1.5.7-SNAPSHOT</version>
     <name>Java-WebSocket</name>
     <description>A barebones WebSocket client and server implementation written 100% in Java</description>
     <url>https://github.com/TooTallNate/Java-WebSocket</url>