Adding plugin to import from Jekyll/Nikola sites

Hi there!

I've created a plugin to import Jekyll/Octopress sites to Nikola.

I've taken almost all code from my previous project https://github.com/magmax/jekyll2nikola
what do you mean?

I really do not know why all those lines changed.

I'm trying to use unicode literals and new print function in order to make it easy to migrate to 
python3

Next revision won't have `six` or `pprint`.