Print versions of software used in Travis output

tools/heading.py

@@ -0,0 +1,14 @@
+#!/usr/bin/env python
+
+from __future__ import print_function
+import sys
+
+screen_width = 50
+
+print('*' * screen_width)
+
+if len(sys.argv) > 1:
+    header = ' '.join(sys.argv[1:])
+    print('*', header.center(screen_width - 4), '*')
+    print('*' * screen_width)
+