StartsInstance and StopsInstance

See #1877, release log:

• c7545b5 by @yegor256: #1877 heroku netrc
• 84ebcf3 by @yegor256: #1877 heroku
• afdcf97 by @yegor256: #1877 ConnectsInstance
• 5bfd789 by @yegor256: #1877 typo in URL matching
• e88ecab by @yegor256: #1877 URL checking fixed
• 78ffea4 by @yegor256: #1877 show skipped
• 2afc866 by @yegor256: #1877 show pings
• bc8f5e8 by @yegor256: #1877 kills and pings
• df9b9d5 by @yegor256: #1877 sleep longer
• 2282ae7 by @yegor256: #1877 stop properly
• 4b430ae by @yegor256: #1877 sleep
• 7ec057c by @yegor256: #1877 describe
• 1104ba2 by @yegor256: #1877 log
• b2254f3 by @yegor256: #1877 typo
• 52bca8d by @yegor256: #1877 show all instances
• 4ffe471 by @yegor256: #1877 tag by talk name
• 039841c by @yegor256: #1877 wait for running state
• 24d2c4f by @yegor256: #1877 simplified
• 8d70e40 by @yegor256: #1877 one ctor
• 366f5de by @yegor256: #1877 use public IP
• and 64 more...

Released by Rultor 1.76.1, see build log