Create start.md
Traduction Getting Started
Traduction Wait, what is this thing?
Traduction The Spark Cloud
Traduction Tinkering with "Tinker"
Traduction Flash Apps with Spark Build
Traduction du reste
Create connect.md
Merge from upstream
Traduction connect.md
Updated start.md and connect.md with previous changes on english doc
Merge pull request #134 from aboudou/master

French translation for start.md and connect.md pages