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.
This title should be changed to something which makes sense without the context of just having followed the tutorial. Something along the lines of "Examples of Advanced Flocker Features", or "Examples of Flocker Features In Use" but more catchy.