Merge pull request +15141 from c9/ide-go-hint

Add tip about go not being on path

package.json

@@ -96,7 +96,7 @@
         "c9.ide.immediate": "#0b0ee744f9",
         "c9.ide.installer": "#2921efaf6d",
         "c9.ide.language.python": "#189b55135d",
-        "c9.ide.language.go": "#c58539fc05",
+        "c9.ide.language.go": "#e018761e24",
         "c9.ide.navigate": "#5d5707058c",
         "c9.ide.newresource": "#636e7a7345",
         "c9.ide.openfiles": "#2ae85a9e33",