duplicate class names crash the build

See #362, release log:

• 8630cbf by @yegor256: #362 asm 7.2
• a85c9d0 by @yegor256: #362 asm 7.2
• b2b10c5 by @yegor256: #362 filter dups
• 51b482a by @yegor256: #362 cactoos 0.43
• 2b9e371 by @yegor256: #362 add comment
• d4c6dc1 by @yegor256: #362 tests dont reproduce
• dded63e by @yegor256: #360 max() for elements count
• 355a128 by @yegor256: #360 memory
• 2f6d10d by @yegor256: #360 memory
• 15c2124 by @yegor256: #360 logging
• afb15ef by @yegor256: #360 logging
• 2fc0f65 by @yegor256: #360 toString for date

Released by Rultor 2.0-SNAPSHOT, see build log