Add tip about go not being on path

package.json

@@ -70,7 +70,7 @@
         "c9.ide.language.javascript.tern": "#4d53f32c29",
         "c9.ide.language.javascript.infer": "#b9c2e4bdb8",
         "c9.ide.language.jsonalyzer": "#a0549e14ff",
-        "c9.ide.language.codeintel": "#7de0cedca6",
+        "c9.ide.language.codeintel": "#957b840fff",
         "c9.ide.collab": "#d77a9618ea",
         "c9.ide.local": "#9169fec157",
         "c9.ide.find": "#e632ecf4be",
@@ -95,8 +95,8 @@
         "c9.ide.imgeditor": "#612e75ef4f",
         "c9.ide.immediate": "#0b0ee744f9",
         "c9.ide.installer": "#2921efaf6d",
-        "c9.ide.language.python": "#e1b6ce0937",
-        "c9.ide.language.go": "#c58539fc05",
+        "c9.ide.language.python": "#189b55135d",
+        "c9.ide.language.go": "#e018761e24",
         "c9.ide.navigate": "#5d5707058c",
         "c9.ide.newresource": "#981a408a7b",
         "c9.ide.openfiles": "#2ae85a9e33",
@@ -111,6 +111,7 @@
         "c9.ide.run": "#3cd1f257ca",
         "c9.ide.run.build": "#0598fff697",
         "c9.ide.run.debug.xdebug": "#054367574c",
+        "c9.ide.run.debug.ikpdb": "#2682776d44",
         "c9.ide.save": "#ed8b7a5622",
         "c9.ide.scm": "#637a68cd04",
         "c9.ide.terminal.monitor": "#5a6a54ce24",