Case-normalise package names in requirements.txt

Recent version of pip-tools output all-lowercase package names. This
commit normalises package names to lowercase so that subsequent
meaningful changes to this file don't include spurious case changes.

requirements.txt

@@ -16,7 +16,7 @@ bleach==1.4.3
 celery==3.1.25
 certifi==2016.2.28
 cffi==1.7.0
-Chameleon==2.24           # via deform
+chameleon==2.24           # via deform
 click==6.6
 colander==1.3.1           # via deform
 contextlib2==0.5.4        # via raven
@@ -34,22 +34,22 @@ idna==2.1                 # via cryptography
 ipaddress==1.0.16         # via cryptography
 iso8601==0.1.11           # via colander
 itsdangerous==0.24
-Jinja2==2.8               # via deform-jinja2, pyramid-jinja2
+jinja2==2.8               # via deform-jinja2, pyramid-jinja2
 jsonpointer==1.0
 jsonschema==2.5.1
 kombu==3.0.37
-Mako==1.0.4               # via alembic
-MarkupSafe==0.23          # via jinja2, mako, pyramid-jinja2
+mako==1.0.4               # via alembic
+markupsafe==0.23          # via jinja2, mako, pyramid-jinja2
 mistune==0.7.3
 newrelic==2.68.0.50
 passlib==1.6.5
-PasteDeploy==1.5.2        # via pyramid
+pastedeploy==1.5.2        # via pyramid
 peppercorn==0.5           # via deform
 psycogreen==1.0
 psycopg2==2.6.2
 pyasn1==0.1.9             # via cryptography
 pycparser==2.14           # via cffi
-PyJWT==1.4.1
+pyjwt==1.4.1
 pyparsing==2.1.5
 git+https://github.com/usingnamespace/pyramid_authsanity.git@7d0b70582cd693052a62b4683e521c1f4e2b4aa8#egg=pyramid_authsanity
 pyramid-jinja2==2.6.2
@@ -65,24 +65,20 @@ pytz==2016.6.1            # via celery
 raven==6.0.0
 repoze.lru==0.6           # via pyramid
 repoze.sendmail==4.1
-six==1.10.0               # via bcrypt, bleach, cryptography, html5lib, python-dateutil
 requests-aws4auth==0.9
 requests==2.13.0          # via requests-aws4auth
-SQLAlchemy==1.1.4         # via alembic, zope.sqlalchemy
+six==1.10.0               # via bcrypt, bleach, cryptography, html5lib, python-dateutil
+sqlalchemy==1.1.4
 statsd==3.2.1
 transaction==2.0.3        # via pyramid-tm, repoze.sendmail, zope.sqlalchemy
 translationstring==1.3    # via colander, deform, pyramid
 unicodecsv==0.14.1
-Unidecode==0.4.19         # via python-slugify
+unidecode==0.4.19         # via python-slugify
 urllib3==1.16             # via elasticsearch
 venusian==1.0             # via pyramid
-WebOb==1.6.1              # via pyramid
+webob==1.6.1              # via pyramid
 ws4py==0.3.5
 wsaccel==0.6.2
 zope.deprecation==4.1.2   # via deform, pyramid, pyramid-jinja2
 zope.interface==4.3.2     # via pyramid, pyramid-authsanity, pyramid-services, repoze.sendmail, transaction, zope.sqlalchemy
 zope.sqlalchemy==0.7.7
-
-# The following packages are commented out because they are
-# considered to be unsafe in a requirements file:
-# setuptools                # via cryptography, pyramid, repoze.sendmail, zope.deprecation, zope.interface, zope.sqlalchemy