show all artifacts in /all

See #72, release log:

• e1b1813 by @yegor256: #72 junit to check test status
• 6e7e7ed by @yegor256: #72 tests
• 9201446 by @yegor256: #72 text/html
• a187032 by @yegor256: #72 vnd.jpeek+xml
• 938b6b8 by @yegor256: #72 more tests
• b6ea59e by @yegor256: #72 /all

Released by Rultor 1.66.3, see build log