New authentication flow + Granular permission control

[frabrunelle]

RFCs might change so it’s easier to just include a link to GitHub

see this topic for more details:

Could we maybe put the content of the RFC right here?

Could we maybe put the content of the RFC right here? We do use Markdown, too after all (and makes quoting and discussing easier imho – though it does show the formatting errors ): RFC #0042: SAFE Launcher API v0.6 Status: proposed Type: new feature, enhancement Related components: safe_launcher, safe_core Start Date: 01-09-2016 Discussion: (fill me in with link to RFC discussion - shepherd will complete this) Supersedes: (fill me in with a link to RFC this supersedes - i…