Remove "samples" folder from package

[jmdacruz]

We are currently adding the samples folder into the package, which results in the addition of a top-level samples module in Python when installing our module. This causes confusion, because the top-level package will always shadow the local samples folder. For example, if I modify one of the samples in the local folder (e.g., samples.individual), and then try to load the modified module, I'll still be using the previous version that is now installed in my Python module directory. Another example is adding a new local sample on the samples folder (e.g., samples/foobar.py) and then trying to load this module: This will fail because the global samples folder will override the local one, and the new file is not available on the global module (this happened to #40).

[paguerre2]

[AS DESIGNED] confusion isn't relevant as the samples is intended to explain in simple code how to achieve te goal of subscribing to entities.