docs: spelling fixes
Squashed into 1 commit because I'm lazy:
- non-existant -> nonexistent
- accros -> across
- comptatibility -> compatibility
- requieres -> requires
- aliast -> alias
- unexistent -> nonexistent
- convertion -> conversion
- nto -> not
from __future__ import absolute_import
import pkgutil
__path__ = pkgutil.extend_path(__path__, __name__)