Use pkg_resources to find out local pip version
Use pkg_resources to find out local pip version

Doing a "import pip; pip.__version__" or "from pip import __version__"
poses too much risk with pip's general "no API support", as seen in
#2499.

foosel/OctoPrint,foosel/OctoPrint,Jaesin/OctoPrint,foosel/OctoPrint,Jaesin/OctoPrint,Jaesin/OctoPrint,foosel/OctoPrint,Jaesin/OctoPrint