addd .gitignore

.gitignore

-.DS_Store
-*.pyc
-.*~
-fluid/neural_machine_translation/transformer/deps
-fluid/neural_machine_translation/transformer/train.data
-fluid/neural_machine_translation/transformer/train.pkl
-fluid/neural_machine_translation/transformer/train.sh
-fluid/neural_machine_translation/transformer/train.tok.clean.bpe.32000.en-de
-fluid/neural_machine_translation/transformer/vocab.bpe.32000.refined
+paddle/operators/check_t.save
+paddle/operators/check_tensor.ls
+paddle/operators/tensor.save
+python/paddle/v2/fluid/tests/book/image_classification_resnet.inference.model/
+python/paddle/v2/fluid/tests/book/image_classification_vgg.inference.model/
+python/paddle/v2/fluid/tests/book/label_semantic_roles.inference.model/
+*.DS_Store
+*.vs
+build/
+build_doc/
+*.user
+
+.vscode
+.idea
+.project
+.cproject
+.pydevproject
+.settings/
+CMakeSettings.json
+Makefile
+.test_env/
+third_party/
+
+*~
+bazel-*
+third_party/
+
+build_*
+# clion workspace.
+cmake-build-*
+model_test