Seems like the tarfile uploaded to Pip is missing the README.md file:
File "/private/var/folders/cc/hbpdq7fd06n87nf2zm_g3bfr0000gn/T/pip-build-0MTELf/python-pipedrive/setup.py", line 13, in <module>
long_description=open('README.md').read(),
IOError: [Errno 2] No such file or directory: 'README.md'
Seems like the tarfile uploaded to Pip is missing the README.md file: