tox: Add coverage/docs environments.

tox.ini

@@ -15,6 +15,11 @@ envdir = {toxinidir}/.venv
 usedevelop = true
 
 [testenv:unittests]
+commands =
+    {[testenv:mkvenv]commands}
+    {envpython} -m unittest
+
+[testenv:coverage]
 deps =
     coverage==3.7.1
 commands =
@@ -76,3 +81,12 @@ deps =
 commands =
     {[testenv:mkvenv]commands}
     {envdir}/bin/check-manifest --ignore 'qutebrowser/git-commit-id,qutebrowser/html/doc,qutebrowser/html/doc/*,*/__pycache__'
+
+[testenv:docs]
+deps =
+    -rrequirements.txt
+commands =
+    {[testenv:mkvenv]commands}
+    {envpython} scripts/src2asciidoc.py
+    {envpython} scripts/misc_checks.py git
+    {envpython} scripts/asciidoc2html.py {posargs}