Chainerui

New features

- Highlight a table row and a line of log chart (186)
- 
- Add "Code" download button (198)
- **[Changes without Compatibility]** Drop "JSON" download feature. Downloaded script has all log data as JSON, but data structure is changed with previous version.
- Run downloaded script and will make an image plotted logs. Lines plotted or not are followed by configuration on Web UI.
- <img width="75%" alt="code_downlaod_run" src="https://user-images.githubusercontent.com/414255/48542025-6bf11180-e901-11e8-96d9-5f1efb88511d.png">


Improvements

- Download log chart image with legend (192)
- <img width="75%" alt="png_download" src="https://user-images.githubusercontent.com/414255/48592210-a357d080-e98a-11e8-9d2c-a8c3561cfc78.png">
- Fix output messages from `chainerui` CLI (185)

Bug fixes and refactoring

- Update lower bound of dependent modules (177)
- Drop `--fix` option on eslint, eslint check is in CI (162, 189)
- Drop `CHAINERUI_ENV` environment variable
- Introduce `--db-echo` option on `chainerui` CLI, instead of `CHAINERUI_ENV=development` (191)
- On test, `CHAINERUI_ENV=test` parameter is unnecessary, run only with `pytest` (193, 208)
- Restore metric tooltip on log chart (205)

New features

- support column visibility (156)
- <img src="https://user-images.githubusercontent.com/414255/46521976-40b7e300-c8bc-11e8-9eea-8c79a5c54a92.png" width="25%" />
- <img src="https://user-images.githubusercontent.com/414255/46522015-6a710a00-c8bc-11e8-8933-71012f3aa108.png" width="30%" />
- show last "y" values such as `loss` or `accuracy`, support results sorting by the last `loss` or other "y" values
- <img src="https://user-images.githubusercontent.com/414255/46522096-c2a80c00-c8bc-11e8-90a2-93cdc899d20c.png" width="75%" />


- show legends at all times (163)
- <img src="https://user-images.githubusercontent.com/17793678/45525528-4e72cf00-b80e-11e8-8c65-9924593a6941.png" width="50%" />
- add `--db` option to use external database (153)
- `CHAINERUI_DB_URL` environment variable is also supported
- add "Use exteranal database" chapter on official document (169)

Improvements

- introduce collapsable line config area (178)
- <img src="https://user-images.githubusercontent.com/414255/46522647-54fcdf80-c8be-11e8-85ca-e173e498ec8d.gif" width="25%" />
- follow width of result name cell with column length (170)
- fix a position of ellipsis
- support long key name, names are word-wrapped (179, 180)

Bug fixes and refactoring

- fix position of checkboxes and radio buttons broken by upgraded bootstrap (175)
- drop automatically format fixing on javascript lint (162)
- add connection checker between server and database (167)

- This release is included only bug fix and performance improvement, no new feature.
- DB schema is updated, **please don't forget to execute** `chainerui db upgrade` command after upgrade ChainerUI.

Improvements

- When a project has a lot of results, previous ChainerUI brought on quite a lot slow down, this v0.5.1 fixes them by
- add index (152)
- refactoring database query (154, 155)
- Use `npm` version 6 or later (149)
- improve frontend dependencies (144, 159, 161)

Bug fixes and refactoring

- Support log file included big number like `loss=1.0e28` (171)

Documents

- Follow new features added in v0.5.0 (157)