reduce number of tox and travis envs

bump minimum werkzeug version to fix tests
cache pip pacakges on travis
collect branch coverage
collect coverage of test code
report coverage across envs
test building docs
enable codecov integration

tox.ini

@@ -1,37 +1,65 @@
 [tox]
-envlist = {py26,py27,pypy}-{lowest,release,devel}{,-simplejson}, {py33,py34,py35,py36}-{release,devel}{,-simplejson}
+envlist =
+    py{36,35,34,33,27,26,py}-release
+    py{36,27,py}-release-simplejson
+    py{36,33,27,26,py}-devel
+    py{36,33,27,26,py}-lowest
+    docs-html
+    coverage-report
 
 [testenv]
 passenv = LANG
-usedevelop=true
-commands =
-    # We need to install those after Flask is installed.
-    pip install -e examples/flaskr
-    pip install -e examples/minitwit
-    pip install -e examples/patterns/largerapp
-    pytest --cov=flask --cov-report html []
-deps=
-    pytest
-    pytest-cov
+usedevelop = true
+deps =
+    pytest>=3
+    coverage
     greenlet
+    blinker
 
-    lowest: Werkzeug==0.7
+    lowest: Werkzeug==0.9
     lowest: Jinja2==2.4
     lowest: itsdangerous==0.21
     lowest: Click==4.0
-    lowest: blinker==1.0
 
-    release: blinker
-
-    devel: git+https://github.com/pallets/werkzeug.git
-    devel: git+https://github.com/pallets/markupsafe.git
-    devel: git+https://github.com/pallets/jinja.git
-    devel: git+https://github.com/pallets/itsdangerous.git
-    devel: git+https://github.com/pallets/click.git
-    devel: git+https://github.com/jek/blinker.git
+    devel: https://github.com/pallets/werkzeug/archive/master.tar.gz
+    devel: https://github.com/pallets/markupsafe/archive/master.tar.gz
+    devel: https://github.com/pallets/jinja/archive/master.tar.gz
+    devel: https://github.com/pallets/itsdangerous/archive/master.tar.gz
+    devel: https://github.com/pallets/click/archive/master.tar.gz
 
     simplejson: simplejson
+commands =
+    # the examples need to be installed to test successfully
+    pip install -e examples/flaskr -q
+    pip install -e examples/minitwit -q
+    pip install -e examples/patterns/largerapp -q
 
-[testenv:docs]
+    # pytest-cov doesn't seem to play nice with -p
+    coverage run -p -m pytest
+
+[testenv:docs-html]
+deps =
+    sphinx
+    flask-sphinx-themes
+commands = sphinx-build -W -b html -d {envtmpdir}/doctrees docs docs/_build/html
+
+[testenv:docs-linkcheck]
 deps = sphinx
 commands = sphinx-build -W -b linkcheck -d {envtmpdir}/doctrees docs docs/_build/linkcheck
+
+[testenv:coverage-report]
+deps = coverage
+skip_install = true
+commands =
+    coverage combine
+    coverage report
+    coverage html
+
+[testenv:codecov]
+passenv = CI TRAVIS TRAVIS_*
+deps = codecov
+skip_install = true
+commands =
+    coverage combine
+    coverage report
+    codecov