Change directory structure

.gitignore

@@ -161,3 +161,9 @@ cython_debug/
 #  and can be added to the global gitignore or merged into this file.  For a more nuclear
 #  option (not recommended) you can uncomment the following to ignore the entire idea folder.
 #.idea/
+
+
+#Only the directory structure is retained under the "data" directory.
+/data/**
+!/data/**/
+!/data/**/.gitkeep