commit gitignore file for better team organization

Author: xiaoli0

.gitignore

@@ -0,0 +1,23 @@
+.*
+
+# Compiled python modules.
+*.pyc
+
+# Setuptools distribution folder.
+dist/
+
+# Python egg metadata, regenerated from source files by setuptools.
+*.egg-info
+*.egg
+
+# Sphinx doc build files
+build*
+docs/build*
+
+# ipython notebook files
+*/.ipynb_checkpoints/*
+*.ipynb
+
+# python cache
+*/__pycache__/*
+