Merge remote-tracking branch 'origin/v1' into merging-from-v1

.travis.yml

@@ -27,7 +27,7 @@ matrix:
 before_script:
 - $pip_install flake8
 - go get github.com/urfave/gfmrun/...
-- go get golang.org/x/tools/cmd/goimports
+- go get golang.org/x/tools/cmd/goimports || true
 - if [ ! -f node_modules/.bin/markdown-toc ] ; then
     npm install markdown-toc ;
   fi

runtests

@@ -107,7 +107,7 @@ def _toc():
 @_target
 def _gen():
     go_version = check_output('go version'.split()).split()[2]
-    if go_version < 'go1.4':
+    if go_version < 'go1.5':
         print('runtests: skip on {}'.format(go_version), file=sys.stderr)
         return