DOC: Adding cookbook data file, to avoid doc error
The cookbook shows an example of a file generated from a C program, that then is opened with pandas (numpy). The file doesn't exist, and the example can't run.

Adding the file (generated with the cookbook code shown in the example), and updating the path, so it's loaded form the right location.

https://pandas-docs.github.io/pandas-docs-travis/cookbook.html#binary-files


