adjusted tox to test both DRF2 and DRF3

Makefile

@@ -7,6 +7,7 @@ COVER_FLAGS=${COVER_CONFIG_FLAGS} ${COVER_REPORT_FLAGS}
 
 help:
 	@echo "install - install all requirements including for testing"
+	@echo "install-quite - same as install but pipes all output to /dev/null"
 	@echo "clean - remove all artifacts"
 	@echo "clean-build - remove build artifacts"
 	@echo "clean-pyc - remove Python file artifacts"
@@ -23,6 +24,9 @@ help:
 install:
 	pip install -r requirements-dev.txt
 
+install-quite:
+	pip install -r requirements-dev.txt > /dev/null
+
 clean: clean-build clean-pyc clean-test-all
 
 clean-build:

tox.ini

@@ -1,15 +1,22 @@
 [tox]
 envlist =
-    py27, py34, pypy, pypy3
+    {py27,py34,pypy,pypy3}-drf{2,3}
 
 [testenv]
+basepython =
+    py27: python2.7
+    py34: python3.4
+    pypy: pypy
+    pypy3: pypy3
 setenv =
     PYTHONPATH = {toxinidir}:{toxinidir}/multinosetests
 commands =
+    make install-quite
     pip freeze
     make check
 deps =
-    -rrequirements-dev.txt
+    drf2: djangorestframework<3
+    drf3: djangorestframework>=3
 whitelist_externals =
     make