Display hashdigest instead of hash object upon failure.
add missing PermissionError import
add note about quoting requirement specifiers
quote our examples that use > or <
short test cache path segments to undercut windows path length
don't install or build wheels for distribute in python3
Merge pull request #937 from qwcode/ignore_reqs

don't install or build wheels for distribute in python 3
Added a pypip.in badge with the latest version.
write pip delete marker into global build dir upon creation
Merge pull request #948 from qwcode/global_build_cleanup

write pip delete marker into global build dir upon creation
wheel: make sure destination path exists
include test installing headers
write something about whether binary wheels go on pypi
Update cookbook.rst
Merge pull request #956 from dholth/develop

write something about whether binary wheels go on pypi
have cleanup be in a finally after wheel building
remove 'pip wheel --unpack-only'
--no-clean for 'pip wheel'
Merge pull request #958 from qwcode/wheel_cleanup

Wheel cleanup
single definition of find_links