text: Title: Add FAQ with answers to the most common questions to the documentation
  Body: It would be helpful to include a more immediate link to where to get help and a FAQ on the readme and in the documentation.
  
  - **Q.** I've already got results from my Monte Carlo simulation - which technique can I use?
    **A.** DMIM
  - **Q.** I get this error when installing SALib 1.3 with Python 2.7
    **A.** SALib 1.3 onwards does not support Python 2.7
  - **Q.** Can you help me with implementing my sensitivity analysis?
    **A.** Check out the examples [here](https://github.com/SALib/SALib/tree/master/examples)