update development resources

fix tox to test examples again
add detox tox env for faster testing
clean up makefile, add tox target
add extra group for installing dev requirements
clean up contributing doc, build with docs
expand issue template
add pull request template

tox.ini

@@ -1,7 +1,7 @@
 [tox]
 envlist =
-    py{36,35,34,33,27,26,py}-release
-    py{36,27,py}-release-simplejson
+    py{36,35,34,33,27,26,py}
+    py{36,27,py}-simplejson
     py{36,33,27,26,py}-devel
     py{36,33,27,26,py}-lowest
     docs-html
@@ -35,12 +35,10 @@ commands =
     pip install -e examples/patterns/largerapp -q
 
     # pytest-cov doesn't seem to play nice with -p
-    coverage run -p -m pytest
+    coverage run -p -m pytest tests examples
 
 [testenv:docs-html]
-deps =
-    sphinx
-    flask-sphinx-themes
+deps = sphinx
 commands = sphinx-build -W -b html -d {envtmpdir}/doctrees docs docs/_build/html
 
 [testenv:docs-linkcheck]
@@ -63,3 +61,10 @@ commands =
     coverage combine
     coverage report
     codecov
+
+[testenv:detox]
+skip_install = true
+deps = detox
+commands =
+    detox -e py{36,35,34,33,27,26,py},py{36,27,py}-simplejson,py{36,33,27,26,py}-devel,py{36,33,27,26,py}-lowest,docs-html
+    tox -e coverage-report