update dev/build requirements

requirements.txt

-alabaster==0.7.9
+alabaster==0.7.10
+appdirs==1.4.2
 Babel==2.3.4
 bleach==1.5.0
-check-manifest==0.34
-click==6.6
+check-manifest==0.35
+click==6.7
 colorama==0.3.7
 CommonMark==0.5.4
 configparser==3.5.0
 cookies==2.2.1
-coverage==4.2
-docutils==0.12
+coverage==4.3.4
+docutils==0.13.1
 enum34==1.1.6
-flake8==3.0.4
+flake8==3.3.0
+flake8-builtins==0.2
 funcsigs==1.0.2
 future==0.16.0
 html5lib==0.999999999
 imagesize==0.7.1
 isort==4.2.5
-Jinja2==2.8
+Jinja2==2.9.5
 linecache2==1.0.0
 MarkupSafe==0.23
-mccabe==0.5.2
+mccabe==0.6.1
 mock==2.0.0
 ordereddict==1.1
-pbr==1.10.0
+packaging==16.8
+pbr==2.0.0
 pep8==1.7.0
-pockets==0.3
-py==1.4.31
+pluggy==0.4.0
+pockets==0.3.2
+py==1.4.32
 pycallgraph==1.0.1
-pycodestyle==2.1.0
-pyflakes==1.3.0
-Pygments==2.1.3
-pytest==3.0.3
+pycodestyle==2.3.1
+pyflakes==1.5.0
+Pygments==2.2.0
+-e git+git@gitlab.com:/rhab/PyOTRS@480a86f37ed35d8658ce86de83047082c52a4a8f#egg=PyOTRS
+pyparsing==2.1.10
+pytest==3.0.6
 pytest-cov==2.4.0
-pytz==2016.7
+pytz==2016.10
 recommonmark==0.4.0
-requests==2.11.1
+requests==2.13.0
 responses==0.5.1
 six==1.10.0
 snowballstemmer==1.2.1
-Sphinx==1.4.8
-sphinx-rtd-theme==0.1.9
-sphinxcontrib-napoleon==0.5.3
+Sphinx==1.5.3
+sphinx-rtd-theme==0.2.2
+sphinxcontrib-napoleon==0.6.1
 test==2.3.4.5
+tox==2.6.0
 traceback2==1.4.0
 unittest2==1.1.0
+virtualenv==15.1.0
 webencodings==0.5