Fix some trailing gfmxr refs

.travis.yml

@@ -31,7 +31,6 @@ before_script:
 - if [ ! -f node_modules/.bin/markdown-toc ] ; then
     npm install markdown-toc ;
   fi
-- go get github.com/urfave/gfmxr/...
 - mkdir -p ${GOPATH%%:*}/src/gopkg.in/urfave
 - rm -rvf ${GOPATH%%:*}/src/gopkg.in/urfave/cli.v2
 - rm -rvf ${GOPATH%%:*}/pkg/*/gopkg.in/urfave/cli.v2.a

runtests

@@ -83,7 +83,7 @@ def _migrations():
     try:
         os.chdir(tmpdir)
         _run('curl -sSL -o README.md {}'.format(v1_readme_url).split())
-        _run('gfmxr extract -o .'.split())
+        _run('gfmrun extract -o .'.split())
 
         for gofile in glob.glob('*.go'):
             for i in (0, 1):