Add git hash (from refs/remotes/origin/master) to error reports.

Signed-off-by: Jeffrey Han <itdelatrisu@gmail.com>

src/itdelatrisu/opsu/ErrorHandler.java

@@ -171,6 +171,12 @@ public class ErrorHandler {
 			if (version != null && !version.equals("${pom.version}")) {
 				sb.append("**Version:** ");
 				sb.append(version);
+				String hash = Utils.getGitHash();
+				if (hash != null) {
+					sb.append(" (");
+					sb.append(hash.substring(0, 12));
+					sb.append(')');
+				}
 				sb.append('\n');
 			}
 			String timestamp = props.getProperty("build.date");