Cleanup tox test runs:

- Silence setuptools chatter during test runs.

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

- Drop spurious 'zope.testing' under tox.

.gitignore

@@ -1,3 +1,6 @@
 *.egg-info
 *.pyc
 .tox/
+.coverage
+coverage.xml
+nosetests.xml

setup.cfg

@@ -0,0 +1,8 @@
+[nosetests]
+nocapture=1
+cover-package=zope.filerepresentation
+cover-erase=1
+cover-min-percentage=100
+with-doctest=0
+where=src
+

tox.ini

@@ -1,25 +1,20 @@
 [tox]
 envlist =
-    py26,py27,py33,py34,pypy,pypy3
+    py26,py27,py33,py34,pypy,pypy3,coverage
 
 [testenv]
 commands =
-    python setup.py test -q
+    python setup.py -q test -q
 # without explicit deps, setup.py test will download a bunch of eggs into $PWD
 deps =
     zope.interface
     zope.schema
-    zope.testing
 
 [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.filerepresentation
-    pip install -e .
     nosetests --with-xunit --with-xcoverage
 deps =
     nose