Add direct link to launch the notebooks on MyBinder and Google Colab

[Naereen]

Hi! You can see on my notebooks/README.md how I added link (with badges) to launch directly the notebooks in dynamical environments online.

Example:

## 2. Question: *How to read these documents*?

### 2.a. View the _notebooks_ statically :memo:
- Either directly in GitHub: [see the list of notebooks](https://github.com/SMPyBandits/SMPyBandits/search?l=jupyter-notebook);
- Or on [nbviewer.jupiter.org](http://nbviewer.jupiter.org/): [list of notebooks](http://nbviewer.jupyter.org/github/SMPyBandits/SMPyBandits/).

### 2.b. Play with the _notebooks_ dynamically (on MyBinder) :boom:
[![Binder](https://mybinder.org/badge_logo.svg)](http://mybinder.org/v2/gh/SMPyBandits/SMPyBandits/master?filepath=notebooks)

Anyone can use the [mybinder.org](http://mybinder.org/) website (by [clicking](http://mybinder.org/v2/gh/SMPyBandits/SMPyBandits/master?filepath=notebooks) on the icon above) to run the notebook in her/his web-browser.
You can then play with it as long as you like, for instance by modifying the values or experimenting with the code.

[![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/SMPyBandits/SMPyBandits/master?filepath=notebooks%2FDo_we_even_need_UCB.ipynb)

- [Do_we_even_need_UCB.ipynb](https://mybinder.org/v2/gh/SMPyBandits/SMPyBandits/master?filepath=notebooks%2FDo_we_even_need_UCB.ipynb)  [![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/SMPyBandits/SMPyBandits/master?filepath=notebooks%2FDo_we_even_need_UCB.ipynb)

### 2.c. Play with the _notebooks_ dynamically (on Google Colab) :boom:

Anyone can use the [colab.research.google.com/notebook](https://colab.research.google.com/notebook) website (by [clicking](XXX) on the icon above) to run the notebook in her/his web-browser.
You can then play with it as long as you like, for instance by modifying the values or experimenting with the code.

- [Do_we_even_need_UCB.ipynb](https://colab.research.google.com/github/SMPyBandits/SMPyBandits/blob/master/notebooks/Do_we_even_need_UCB.ipynb)  [![Google Colab](https://badgen.net/badge/Launch/on%20Google%20Colab/blue?icon=terminal)](https://colab.research.google.com/github/SMPyBandits/SMPyBandits/blob/master/notebooks/Do_we_even_need_UCB.ipynb)

2. Question: How to read these documents?

2.a. View the notebooks statically :memo:

• Either directly in GitHub: see the list of notebooks;
• Or on nbviewer.jupiter.org: list of notebooks.

2.b. Play with the notebooks dynamically (on MyBinder) :boom:

Anyone can use the mybinder.org website (by clicking on the icon above) to run the notebook in her/his web-browser. You can then play with it as long as you like, for instance by modifying the values or experimenting with the code.

• Do_we_even_need_UCB.ipynb

2.c. Play with the notebooks dynamically (on Google Colab) :boom:

Anyone can use the colab.research.google.com/notebook website (by clicking on the icon above) to run the notebook in her/his web-browser. You can then play with it as long as you like, for instance by modifying the values or experimenting with the code.

• Do_we_even_need_UCB.ipynb

[guilgautier]

Hi @Naereen! This is a very interesting suggestion :) I've been thinking about it since the Tuto_DPPy.ipynb was actually created on Google Colab, but I didn't know how useful it would be at that time.

[Naereen]

Another example of Markdown code, for another of my repository:

[![Binder](https://mybinder.org/badge.svg)](https://mybinder.org/v2/gh/Naereen/ParcourSup.py/master?filepath=notebooks%2FParcourSup.py_version_simplifiee.ipynb)

[![Google Colab](https://badgen.net/badge/Lancer/sur%20Google%20Colab/blue?icon=terminal)](https://colab.research.google.com/github/Naereen/ParcourSup.py/blob/master/notebooks/ParcourSup.py_version_simplifiee.ipynb)

[Naereen]

I guess this is enough. Tell me what you think @guilgautier and merge #37 if you like it!

[guilgautier]

Looks great! I am about to merge #37 Thanks very much 🙏

[Naereen]

Great!