update requirements

.requirements.diff

@@ -1,24 +1,49 @@
 diff --git i/requirements_dev.txt w/requirements_dev.txt
-index 13adb71..e2087c6 100644
+index e2087c6..f4a1c4e 100644
 --- i/requirements_dev.txt
 +++ w/requirements_dev.txt
-@@ -24,8 +24,10 @@ ipython==4.0.1            # via ipdb
- jinja2==2.8               # via sphinx
- markupsafe==0.23          # via jinja2
- mccabe==0.3.1             # via flake8
-+mock==1.3.0
- path.py==8.1.2            # via pickleshare
- pathtools==0.1.2          # via watchdog
-+pbr==1.8.1                # via mock
- pep8==1.5.7               # via flake8
- pexpect==4.0.1            # via ipython
- pickleshare==0.5          # via ipython
-@@ -43,7 +45,7 @@ pytz==2015.7              # via babel
- pyyaml==3.11
+@@ -8,16 +8,13 @@ alabaster==0.7.7          # via sphinx
+ argh==0.26.1              # via watchdog
+ babel==2.1.1              # via sphinx
+ bumpversion==0.5.3
+-cffi==1.4.2               # via cryptography
+ click==6.2                # via pip-tools
+ coverage==4.0.3
+-cryptography==1.1.2
+ decorator==4.0.6          # via ipython, traitlets
+ docutils==0.12            # via restructuredtext-lint, sphinx
+ first==2.0.1              # via pip-tools
+ flake8==2.5.1
+ future==0.15.2
+-idna==2.0                 # via cryptography
+ ipdb==0.8.1
+ ipython-genutils==0.1.0   # via traitlets
+ ipython==4.0.1            # via ipdb
+@@ -35,17 +32,15 @@ pip-tools==1.4.2
+ pluggy==0.3.1             # via tox
+ ptyprocess==0.5           # via pexpect
+ py==1.4.31                # via pytest, tox
+-pyasn1==0.1.9             # via cryptography
+-pycparser==2.14           # via cffi
+ pyflakes==1.0.0           # via flake8
+ pygments==2.0.2           # via sphinx
+ pytest-mock==0.9.0
+ pytest==2.8.5
+ pytz==2015.7              # via babel
+-pyyaml==3.11
++pyyaml==3.11              # via watchdog
  restructuredtext-lint==0.14.0
  simplegeneric==0.8.1      # via ipython
--six==1.10.0               # via cryptography, pip-tools, sphinx
-+six==1.10.0               # via cryptography, mock, pip-tools, sphinx
+-six==1.10.0               # via cryptography, mock, pip-tools, sphinx
++six==1.10.0               # via mock, pip-tools, sphinx
  snowballstemmer==1.2.1    # via sphinx
  sphinx-rtd-theme==0.1.9   # via sphinx
  sphinx==1.3.3
+@@ -54,7 +49,3 @@ traitlets==4.0.0          # via ipython
+ virtualenv==13.1.2        # via tox
+ watchdog==0.8.3
+ wheel==0.26.0
+-
+-# The following packages are commented out because they are
+-# considered to be unsafe in a requirements file:
+-# setuptools==19.2          # via cryptography

requirements_dev.in

@@ -27,13 +27,6 @@ sphinx
 watchdog
 restructuredtext_lint
 
-# DIST UTILITIES
-# -------------------------------------
-# required by `travis_pypi_setup.py`
-cryptography
-PyYAML
-
-
 # DEV UTILITIES (Your stuff here)
 # -------------------------------------
 ipdb

requirements_dev.txt

@@ -8,16 +8,13 @@ alabaster==0.7.7          # via sphinx
 argh==0.26.1              # via watchdog
 babel==2.1.1              # via sphinx
 bumpversion==0.5.3
-cffi==1.4.2               # via cryptography
 click==6.2                # via pip-tools
 coverage==4.0.3
-cryptography==1.1.2
 decorator==4.0.6          # via ipython, traitlets
 docutils==0.12            # via restructuredtext-lint, sphinx
 first==2.0.1              # via pip-tools
 flake8==2.5.1
 future==0.15.2
-idna==2.0                 # via cryptography
 ipdb==0.8.1
 ipython-genutils==0.1.0   # via traitlets
 ipython==4.0.1            # via ipdb
@@ -35,17 +32,15 @@ pip-tools==1.4.2
 pluggy==0.3.1             # via tox
 ptyprocess==0.5           # via pexpect
 py==1.4.31                # via pytest, tox
-pyasn1==0.1.9             # via cryptography
-pycparser==2.14           # via cffi
 pyflakes==1.0.0           # via flake8
 pygments==2.0.2           # via sphinx
 pytest-mock==0.9.0
 pytest==2.8.5
 pytz==2015.7              # via babel
-pyyaml==3.11
+pyyaml==3.11              # via watchdog
 restructuredtext-lint==0.14.0
 simplegeneric==0.8.1      # via ipython
-six==1.10.0               # via cryptography, mock, pip-tools, sphinx
+six==1.10.0               # via mock, pip-tools, sphinx
 snowballstemmer==1.2.1    # via sphinx
 sphinx-rtd-theme==0.1.9   # via sphinx
 sphinx==1.3.3
@@ -54,7 +49,3 @@ traitlets==4.0.0          # via ipython
 virtualenv==13.1.2        # via tox
 watchdog==0.8.3
 wheel==0.26.0
-
-# The following packages are commented out because they are
-# considered to be unsafe in a requirements file:
-# setuptools==19.2          # via cryptography