Merge pull request #257 from pointhi/version_fix

[fix] #253

versions.cfg

 pyflakes = 0.7.3
 pytz = 2013b
 pyyaml = 3.10
-requests = 2.2.0
+requests = 2.5.3
 robotframework-debuglibrary = 0.3
 robotframework-httplibrary = 0.4.2
 robotframework-selenium2library = 1.5.0