Update README with more info on GCP and add script to create project

[galderz]

• Add script that speeds up Google Cloud project creation.
• Update README with more detailed instructions for Google Cloud.
• Updated sample yaml file.

[galderz]

Added on more commit with tips on reducing bill consumption on Google Cloud.

[marekjelen]

@cmoulliard you OK copying the script over?

[marekjelen]

@mhausenblas @jorgemoralespou review, please :)

[galderz]

Pushed a couple of commits: first commit reverts the (path to your directory) and adds a note on using pwd, the second adds another entry of an error I've experience.

[galderz]

@marekjelen I've pushed a final commit to add step to install Google Cloud SDK tooling.

[galderz]

@marekjelen Let's integrate this ASAP :)

[jorgemoralespou]

@marekjelen LGTM

[galderz]

Can someone merge this?