Small update and adding README.md with a note for creation of macOS app bundle

Change-Id: I272d0e22ac6edaadfdd39a2e922ea030d60bd5d2
diff --git a/make-osx-bundle.py b/make-osx-bundle.py
index 91a578b..300f36e 100755
--- a/make-osx-bundle.py
+++ b/make-osx-bundle.py
@@ -10,6 +10,8 @@
 from subprocess import Popen, PIPE
 from optparse import OptionParser
 
+os.environ['PATH'] += ":/usr/local/opt/qt5/bin:/opt/qt5/5.8/clang_64/bin"
+
 import platform
 
 if platform.system () != 'Darwin':