rearrange static methods

lib/server.js

@@ -52,12 +52,6 @@ function WalletService() {
   this.notifyTicker = 0;
 };
 
-WalletService.getServiceVersion = function() {
-  if (!serviceVersion)
-    serviceVersion = 'bws-' + require('../package').version;
-  return serviceVersion;
-};
-
 
 // Time after which a Tx proposal can be erased by any copayer. in seconds
 WalletService.DELETE_LOCKTIME = 24 * 3600;
@@ -89,6 +83,15 @@ WalletService.FEE_LEVELS = [{
 }];
 
 
+/**
+ * Gets the current version of BWS
+ */
+WalletService.getServiceVersion = function() {
+  if (!serviceVersion)
+    serviceVersion = 'bws-' + require('../package').version;
+  return serviceVersion;
+};
+
 /**
  * Initializes global settings for all instances.
  * @param {Object} opts