Publish to conda-forge

[gabrielcnr]

@nicoddemus could help here? ;-)

[nicoddemus]

Hmm while trying to create the package I noticed it is broken in Python 3.

  File "D:\Miniconda3\conda-bld\python-ls_1532647931264\_test_env\lib\site-packages\python_ls\__init__.py", line 1, in <module>
    from _ls import iter_ls, ls, xdir
ModuleNotFoundError: No module named '_ls'

It should be:

from ._ls import iter_ls, ls, xdir

I suggest to add Travis testing first. 😉