Update pom.xml back to version 0.4.7

No changes in SDK - User-Agent string with dashes in config.json was
causing malformed url

Author: SidneyAllen

pom.xml

@@ -4,7 +4,7 @@
 	<groupId>com.xero</groupId>
 	<artifactId>xero-java-sdk</artifactId>
 	<packaging>jar</packaging>
-	<version>0.4.8</version>
+	<version>0.4.7</version>
 	<name>Xero-Java SDK</name>
 	<url>http://maven.apache.org</url>
 	<dependencies>