xos-sample-gui-extension cleanup and update with new documentation

Change-Id: I6b70f5127ea631cfdd1f8a372a51c20f547e9c44
diff --git a/.gitignore b/.gitignore
index b83deb0..217665e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,5 @@
 dist/
 .tmp/
 .idea/
+*.DS_Store
+typings/