* Fix warning for hdfs

* Update docs.

* fix: public path cannot be set to root path if not in api mode

* fix: use position argument

* fix: support legacy call method

* doc: update document

* Add readthdocs for VisualDL.

* Update version to beta.1

* Fix readthdocs.

* Fix readthdocs.

* Fix readthdocs.

* * Support starting vdl in python.

* Fix null point error.

* Add introduction to python startup method in README.md.

* Fix blank picture cause of scalar null response.

* release 1.3.0

* update README

* New menu json

* Updated menu.json

* Fix a borken link

* Fix the cn link

* New logo

* Remove ewww line

* Update embedding label color

* Splite the data into matched and not-matched list

* After switching the dimension, also filter the list

* Use color variables to keep track the color

* Update color.

* Complete re layout the documentation on PPO.

* Add how to develop in cn. Also rearrange the demo location.

* Update the doc to use CDN

* Update installation guide.

* Update the doc setting to use layout.html template

* Update the documentations to fix some grammer error