Enhance wiki guia integración cuenca

There's a draft "guide to create cuenca integration" that needs a lot of polishment (in spanish)

https://github.com/Lemoncode/embalse-info/wiki/guia-integracion-cuenca

Go through the video:

https://drive.google.com/open?id=1Vg9dyePUkfKkhFomD4AHwV8pWvMppL7-&usp=drive_fs

And enhance the guide (in markdown) we will use this guide + the video to help other students.

