fix pip install error

[gabx]

Please edit setup.py as indicated. Otherwise, pip install is broken

pip install robobrowser

Collecting robobrowser
Using cached robobrowser-0.5.1.tar.gz
Traceback (most recent call last):
File "", line 20, in
File "/tmp/pip-build-uaebtzeg/robobrowser/setup.py", line 38, in
for requirement in parse_requirements('requirements.txt')
File "/tmp/pip-build-uaebtzeg/robobrowser/setup.py", line 37, in
str(requirement.req)
File "/usr/lib/python3.4/site-packages/pip/req/req_file.py", line 19, in parse_requirements
"parse_requirements() missing 1 required keyword argument: "
TypeError: parse_requirements() missing 1 required keyword argument: 'session'
Complete output from command python setup.py egg_info:
Traceback (most recent call last):

  File "<string>", line 20, in <module>

  File "/tmp/pip-build-uaebtzeg/robobrowser/setup.py", line 38, in <module>

    for requirement in parse_requirements('requirements.txt')

  File "/tmp/pip-build-uaebtzeg/robobrowser/setup.py", line 37, in <listcomp>

    str(requirement.req)

  File "/usr/lib/python3.4/site-packages/pip/req/req_file.py", line 19, in parse_requirements

    "parse_requirements() missing 1 required keyword argument: "

TypeError: parse_requirements() missing 1 required keyword argument: 'session'`

[jmcarp]

Thanks for the patch! I wound up fixing this by skipping parse_requirements entirely in 4878ed3.