Description of problem:
Linkchecker depends on python-requests (in director/aggregator.py and url.py for example) but there is no explicit Requires on it in the spec file.

Version-Release number of selected component (if applicable): linkchecker.x86_64 0:9.0-1.fc20

How reproducible: Always

Steps to Reproduce:
1. Ensure that python-requests is not installed.
2. yum install linkchecker
3. linkchecker http://fedoraproject.org

Actual results:
Traceback (most recent call last):
  File "/usr/bin/linkchecker", line 34, in <module>
    from linkcheck.cmdline import print_version, print_usage, aggregate_url, \
  File "/usr/lib64/python2.7/site-packages/linkcheck/cmdline.py", line 23, in <module>
    from . import checker, fileutil, strformat, plugins
  File "/usr/lib64/python2.7/site-packages/linkcheck/checker/__init__.py", line 24, in <module>
    from .. import strformat, url as urlutil, log, LOG_CHECK
  File "/usr/lib64/python2.7/site-packages/linkcheck/url.py", line 25, in <module>
    import requests
ImportError: No module named requests

Expected results:
A successful run of linkchecker.

Additional info:
To add to the issue, linkchecker requires a newer version of python-requests than what is available in Fedora 20.  If you use the python-requests that's in Fedora 20, you'll run into https://github.com/wummel/linkchecker/issues/478  I'm going to file a bug against python-requests and I'll update this one with that bug number.