Added script for reformatting TF OD API config files (#3)

Merging Marcel's script.

TF_OD_API/reformat_tfodapi_config.py

@@ -0,0 +1,18 @@
+# Simple script for reformatting a pipeline configuration in a 
+# canonical format such that it is possible to use diff to compare
+# two pipelines
+
+# You can directly compare two files using:
+#   diff <(python reformat.py pipeline1.config) <(python reformat.py pipeline2.config)
+
+# Remember to put the models/research directory in your PYTHONPATH before calling
+# the script
+
+from object_detection.protos import pipeline_pb2
+import google.protobuf.text_format as txtf
+import sys
+
+pipeline = pipeline_pb2.TrainEvalPipelineConfig()
+with open(sys.argv[1]) as f:
+    txtf.Merge(f.read(), pipeline)
+print(pipeline)