Switch to 'usedevelop = true' FBO nose / coverage.

tox.ini

@@ -2,7 +2,7 @@
 envlist =
 #   pypy3 pending release of a fix for
 #   https://bitbucket.org/pypy/pypy/issue/1946
-#   py26,py27,py33,py34,pypy,pypy3
+#   py26,py27,py33,py34,pypy,pypy3,coverage,docs
     py26,py27,py33,py34,pypy,coverage,docs
 
 [testenv]
@@ -26,27 +26,11 @@ deps =
     zope.testing
     zope.testrunner
 
-[testenv:coverage-ASIDE]
-basepython =
-    python2.7
-commands =
-    coverage erase
-    coverage run --source=src setup.py -q test -q
-    coverage report --show-missing
-    coverage xml
-deps =
-    {[testenv]deps}
-    coverage
-
 [testenv:coverage]
+usedevelop = true
 basepython =
     python2.7
 commands = 
-#   The installed version messes up nose's test discovery / coverage reporting
-#   So, we uninstall that from the environment, and then install the editable
-#   version, before running nosetests.
-    pip uninstall -y zope.dublincore
-    pip install -e .
     nosetests --with-xunit --with-xcoverage
 deps =
     {[testenv]deps}