Add .gitignore file.

Author: mblondel

.gitignore

@@ -0,0 +1,33 @@
+*.pyc
+*.so
+*~
+.#*
+*.swp
+.DS_Store
+build
+lightning/**/*.html
+
+dist/
+doc/_build/
+doc/auto_examples/
+doc/modules/generated/
+doc/datasets/generated/
+pip-log.txt
+lightning.egg-info/
+.coverage
+coverage
+tags
+coverages.zip
+samples.zip
+doc/coverages.zip
+doc/samples.zip
+coverages
+samples
+doc/coverages
+doc/samples
+
+
+*.nt.bz2
+*.tar.gz
+*.tgz
+joblib