v1.1.0

Bugfixes:
- include doc/ in whl
  commit 05418082dfd6afe331cc0d6529bfb1efb6cb3477

New features:
- PEP 517/518 compatible
  commit 334dbce74682623251eaf06b85a329d00aa86b5d

Documentation:
- pipx
  commit 4698433b70a30504909d3c8a45f6e24a465cb5b9
- pipx ensurepath
  commit c14c792c080c916d69b193a75d8b7c9cffeee3a1