Reorganize and update requirements

- Move test deps to testing.txt
- Move doc deps to docs.txt. IMO - keeps things clearer
- Unpin flake8
- Require sprockets.http installation in edit mode

.travis.yml

@@ -6,8 +6,8 @@ python:
 - 3.6
 - 3.7-dev
 before_install:
-- pip install nose coverage codecov
-- pip install -r requires/development.txt
+- pip install codecov
+- pip install -r requires/testing.txt
 install:
 - pip install -e .
 script:

requires/development.txt

@@ -1,7 +1,4 @@
--rinstallation.txt
--rtesting.txt
-coverage==4.4.2
-flake8==3.5.0
-sphinx==1.5.6
-sphinxcontrib-httpdomain==1.5.0
-tox==1.9.2
+-e .
+-r testing.txt
+-r docs.txt
+flake8

requires/docs.txt

@@ -0,0 +1,2 @@
+sphinx==1.8.2
+sphinxcontrib-httpdomain==1.7.0

requires/testing.txt

@@ -1,2 +1,4 @@
-nose>=1.3.1,<2
+coverage>=4.5,<5
 mock>=1.3,<2
+nose>=1.3.7,<2
+tox>=3.5,<4