Add feature: import from/export to CSV

[PFython]

[gouravkr]

I have taken this up and hope to complete it by next week. If anyone else is interested, you can look at my fork of the repo. I have a working solution already. The code is now undergoing testing for edge cases and enhancements to ensure it gels well with the existing code in the repo. Documentation and tests are also pending.

[PFython]

Really glad to have your help @gouravkr - looking forward to having a look at your work. Thanks again!

[gouravkr]

Created a pull request for this
#33