Fix mustache plugin: Nikola doesn't have current_lang method anymore.
Use setuptools

Forget about distribute, and everything else.  Just use setuptools!
Add a MANIFEST.in.
Use a more inclusive MANIFEST.in
Remove py_modules in setup.py
setuptools is not a given!

Signed-off-by: Chris “Kwpolska” Warrick <kwpolska@gmail.com>
update the requirements list in the manual that nobody uses anyways

[ci skip]

Signed-off-by: Chris “Kwpolska” Warrick <kwpolska@gmail.com>
Merge pull request #925 from getnikola/use-setuptools

Change setup.py to simply use setuptools