Cross Reference: /external/autotest/docs

`Name`	`Date`	`Size`
Up to higher level directory
`atest-diagram.png`	21-Aug-2018	`47.5K`
`best-practices.md`	21-Aug-2018	`24.7K`
`coding-style.md`	21-Aug-2018	`7.8K`
`test-droid.md`	21-Aug-2018	`5K`
`test-that.md`	21-Aug-2018	`4.7K`
`user-doc.md`	21-Aug-2018	`29.3K`