Improve gitbook User and Developer manuals, update links

[jgvictores]

Tracking issue to Improve gitbook User and Developer manuals, and update links.

[jgvictores]

Related:

• https://github.com/asrob-uc3m/actas/issues/148
• https://github.com/roboticslab-uc3m/questions-and-answers/issues/63

[jgvictores]

First steps, update at:

• [x] https://github.com/asrob-uc3m/robotDevastation
• [x] https://github.com/asrob-uc3m/asrob-uc3m.github.io

[jgvictores]

• [x] https://github.com/asrob-uc3m/robotDevastation

Done at 4ccd36e

[jgvictores]

Important: user is bilingual, developer is English only.

[jgvictores]

• [x] https://github.com/asrob-uc3m/asrob-uc3m.github.io

https://github.com/asrob-uc3m/asrob-uc3m.github.io/commit/7eb7bf258eb9e56c72987ddc30dfed10362e8b15

[jgvictores]

Starting by Developer, will be similar to Tutoriales

[jgvictores]

Done for Developer at https://github.com/asrob-uc3m/robotDevastation-developer-manual/commit/784eef5a18860b1f4654faf956568b041aad0615

[jgvictores]

Finished at:

• https://github.com/asrob-uc3m/robotDevastation-user-manual/commit/ed7d5a4d0b60ebe31be574eed533e2dad1aecebc
• https://github.com/asrob-uc3m/robotDevastation-developer-manual/commit/2b918a5eb3587a198e3d53929fa7244eb31ff36d