CBQE-1481: Initial commit for non-sudo cb setup

- Work still in progress
- Setup follows the instructions as per documentation
- Included the setup just for centos, ubuntu as of now
- TODO: windows, mac implementation
- TODO: more tests perhaps

Change-Id: Ida20d869de6d0100eb516757fe99d96ca862a1f9
Reviewed-on: http://review.couchbase.org/27893
Reviewed-by: abhinav dangeti <abhinav.dangeti@gmail.com>
Tested-by: abhinav dangeti <abhinav.dangeti@gmail.com>