added update module

lib/server/update.js

@@ -0,0 +1,26 @@
+/* module update cloud commander */
+
+var exec            = require('child_process').exec;
+
+exports.get = function(){
+    exec('git pull', pull);
+};
+
+/**
+ * function pulls cloud cmd content from repo
+ * @param pError
+ * @param pStdout
+ * @param pStderr
+ */
+function pull(pError, pStdout, pStderr){
+    if (pError !== null) {
+        console.log('exec error: ' + pError);
+    }
+
+    var lExec = {
+        stdout : pStdout,
+        stderr : pStderr || pError
+    };        
+            
+    console.log(lExec);
+}