69 Fix notifications on linux when using notify-send (#70)

* Remove cmd.msg from args when using notify-send

Fixes Issue#69 #69

On linux notify-send responds with 'Invalid number of options' because of an extra empty '' argument introduced by cmd.msg

* Fix options.sticky argument when using notify-send

When using the sticky option with notify-send, it interprets '-t 0' as a single argument. To resolve that '-t' and '0' are sent as separate arguments.
- Executing the following command
"notify-send '-t 0' 'Email Client' '5 new emails' "
- results in
"Cannot parse integer value “Email Client” for -t"

* Log cmd and args to stderr for easier debugging

lib/growl.js

@@ -86,7 +86,7 @@ function setupCmd() {
           type: 'Linux',
           pkg: 'notify-send',
           msg: '',
-          sticky: '-t 0',
+          sticky: '-t',
           icon: '-i',
           priority: {
             cmd: '-u',
@@ -214,6 +214,7 @@ function growl(msg, opts, callback) {
 
   // sticky
   if (options.sticky) args.push(cmd.sticky);
+  if (options.sticky && cmd.type === 'Linux') args.push('0');
 
   // priority
   if (options.priority) {
@@ -272,13 +273,8 @@ function growl(msg, opts, callback) {
       }
       break;
     case 'Linux':
-      if (options.title) {
-        args.push(options.title);
-        args.push(cmd.msg);
-        args.push(msg.replace(/\\n/g, '\n'));
-      } else {
-        args.push(msg.replace(/\\n/g, '\n'));
-      }
+      if (options.title) args.push(options.title);
+      args.push(msg.replace(/\\n/g, '\n'));
       break;
     case 'Windows':
       args.push(msg.replace(/\\n/g, '\n'));
@@ -312,6 +308,11 @@ function growl(msg, opts, callback) {
   let stderr = '';
   let error;
 
+  const now = new Date();
+  const timestamp = `${now.getHours()}:${now.getMinutes()}:${now.getSeconds()}.${now.getMilliseconds()}`
+
+  stderr += `[${timestamp}][node-growl] : Executed command '${cmdToExec}' with arguments '${args}'\n[stderr] : `;
+
   child.on('error', (err) => {
     console.error('An error occured.', err);
     error = err;