adding in gitignore file to match other controllers (#25)

Issue #, if available:
N/A
Description of changes:
adding in an initial gitignore file that matches other controllers

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

Signed-off-by: Adam D. Cornett <[email protected]>

Author: acornett21

.gitignore

@@ -0,0 +1,7 @@
+.DS_Store
+*.swp
+*~
+.idea
+/docs/site
+bin
+build