* chore: code polishment

* fix: calculate step width in tooltip (#672)

* doc: update readme

* feat: histogram

* Fix warning for hdfs

* Update docs.

* fix: graph export style missing

* bump 2.0.0-beta.6

* build: use stable channel of rust toolchain

* feat: support model graph from backend

* feat: add filename in graph api

* feat: support api token key in visualdl service

* Add --model to parameters.

* Add histogram, add hdfs.

* build: update travis-ci configuration

* fix: public path error in graphs page

* chore: update dependencies

* feat: high-dimensional chart will fit screen size now

* fix: scatter chart cannot be rendered properly

* chore: separate api module

* intergrate netron

* intergrate netron

* feat: graphs

* style: fix lint

* chore: update dependencies

* fix: type error

* chore: update dependencies

* chore: update graph color

changes made:
1. adjusted path to relative path
2. added an installation method (installing by coding)
Co-authored-by: NZeyu Chen <chenzeyu01@baidu.com>

* 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

* bump 2.0.0-beta.2

* chore: render static files in memory

* fix: empty requests in high-dimensional chart

* feat: reduce fetching interval when components is empty

* feat: show loading tip when components is empty

* chore: delete unused files

* bump 2.0.0-beta.3

* chore: remove model_pb argument

* fix: windows file encoding error

* fix: windows path sep error

* feat: add --api-only argument

* feat: add docker runtime

* style: remove unused variable

* pref: use tuple to reduce memory usage in template render

* chore: build opencv for docker alpine to reduce image size

* fix: high-dimensional page error when runs and tags mismatching

* build: fix build error and add docker build

* build: fix build error and add docker build

* build: fix build error and add docker build

* Add readthdocs for VisualDL.

* Update version to beta.1

* Fix readthdocs.

* Fix readthdocs.

* Fix readthdocs.

* feat: add tag select in high-dimensional page

* v2.0.0-beta.43