Merge pull request #3751 from dmead28/LensStudio

Added LensStudio.gitignore (Ted Brown)

community/LensStudio.gitignore

+# gitignore template for LensStudio
+# website: https://lensstudio.snapchat.com/
+
+# macOS/IDE #
+.DS_Store
+.idea
+
+# js #
+node_modules
+yarn.lock
+
+# Python #
+__pycache__/
+*.py[cod]
+*$py.class
+[Bb]ackup*