Merge branch 'master' of github.com:perl6/doc

Author: fluca1978

shippable.yml

@@ -7,8 +7,6 @@ build:
     - install-zef-as-user && zef --/tap-harness --depsonly install .
 
   ci:
+    - PATH=~/.perl6/bin:/opt/rakudo-pkg/bin:$PATH && export PATH
     - P6_DOC_TEST_VERBOSE=1 make test
 
-  on_failure:
-    - ls $SHIPPABLE_BUILD_DIR/t
-    - docker run -t -v $TRAVIS_BUILD_DIR:/test --entrypoint="/bin/sh" jjmerelo/perl6-doccer -c "ls /test"