fixed import and encoding problem

Hi!
I was having a problem that ended out being an import problem.

I am not very proficient with python but i managed to fixe it at least on my sublime text 2.

After fixing the import problem I had an encoding problem (line 35 goTranslate.py) which is also fixed.

Since your plugin is not present on the sublime package manager I also added instructions to the readme on how to install a your plugin.

Thanks for the plugin, and honestly hope that you find my contribution useful ( its my first pull request :P )