Streamline tutorial docs

Fixes #634 
Replaces repetitive tutorials with an "Examples" section in "Getting Started", with much simplified structure and tutorials replaced with more minimal example Flocker config files and instructions.
:question: I think this should be "into" the database. I think that the above section and this one should be merged, as you are only connecting as the first step to insert the row. The split up code blocks are also unusual.