Add requirements_tests.txt to VersionEye

Now that VersionEye added support for extra requirements* file[1],
we also want to track dependencies on requirements_tests.txt.

1. https://bitbucket.org/versioneye/versioneye/issue/24/allow-tracking-custom-dependencies-files#comment-17018333

README.md

@@ -1,4 +1,4 @@
-cctrl [![Build Status](https://travis-ci.org/cloudControl/cctrl.svg?branch=master)](https://travis-ci.org/cloudControl/cctrl)[![PyPI version](https://badge.fury.io/py/cctrl.svg)](http://badge.fury.io/py/cctrl)[![Dependency Status](https://www.versioneye.com/user/projects/54e202066a183a9022000011/badge.svg?style=flat)](https://www.versioneye.com/user/projects/54e202066a183a9022000011)
+cctrl [![Build Status](https://travis-ci.org/cloudControl/cctrl.svg?branch=master)](https://travis-ci.org/cloudControl/cctrl)[![PyPI version](https://badge.fury.io/py/cctrl.svg)](http://badge.fury.io/py/cctrl)[![Dependency Status](https://www.versioneye.com/user/projects/551cff633661f134fe000410/badge.svg?style=flat)](https://www.versioneye.com/user/projects/551cff633661f134fe000410)
 =====
 
 `cctrl` is a set of command line utilities to help you create and manage applications

requirements_tests.txt

@@ -1,7 +1,7 @@
 -r requirements.txt
 mock==1.0.1
-pytest==2.6.4
+pytest==2.7.0
 pytest-pep8==1.0.6
 pytest-cov==1.8.1
 python-coveralls==2.5.0
-unittest2==0.8.0
+unittest2==1.0.1