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

.travis.yml

@@ -26,7 +26,7 @@ matrix:
 
 before_script:
 - $pip_install flake8
-- go get github.com/urfave/gfmrun/...
+- go get github.com/urfave/gfmrun/... || true
 - go get golang.org/x/tools/... || true
 - if [ ! -f node_modules/.bin/markdown-toc ] ; then
     npm install markdown-toc ;

runtests

@@ -61,6 +61,10 @@ def _test():
 
 @_target
 def _gfmrun():
+    go_version = check_output('go version'.split()).split()[2]
+    if go_version < 'go1.3':
+        print('runtests: skip on {}'.format(go_version), file=sys.stderr)
+        return
     _run(['gfmrun', '-c', str(_gfmrun_count()), '-s', 'README.md'])