Speed up build process (#2312)

* We don't need all dependecies to run 'tox -e lint'
* We don't really use pytest-django but it wouldn't hurt
  setting --reuse-db
* coveralls doesn't seem to be working at the moment so
  I removed it
* Delete unused runtests.sh. 'tox -e py27' already does
  the same job.
* Cache all dependencies in Travis CI

Author: berkerpeksag

.travis.yml

@@ -6,13 +6,13 @@ env:
  - TOX_ENV=py27
  - TOX_ENV=docs
  - TOX_ENV=lint
+cache:
+  directories:
+    - ~/.cache/pip
 install:
  - pip install tox
- - pip install coveralls
 script:
  - tox -e $TOX_ENV
-after_success:
- - coveralls
 notifications:
   slack:
     rooms:

pytest.ini

@@ -0,0 +1,2 @@
+[pytest]
+addopts = --reuse-db

requirements/lint.txt

@@ -0,0 +1,7 @@
+-r pip.txt
+maxcdn
+astroid<1.4
+pylint<1.5
+prospector
+pylint-django<0.7
+pyflakes<1.2.0

runtests.sh

@@ -19,14 +19,7 @@ commands =
     sphinx-build -b html -d {envtmpdir}/doctrees .  {envtmpdir}/html
 
 [testenv:lint]
-deps =
-    {[testenv]deps}
-    maxcdn
-    astroid<1.4
-    pylint<1.5
-    prospector
-    pylint-django<0.7
-    pyflakes<1.2.0
+deps = -r{toxinidir}/requirements/lint.txt
 commands =
     prospector \
     --profile-path={toxinidir} \