XSD

See #10, release log:

• e2b4de6 by @yegor256: #10 more types
• 520ea10 by @yegor256: #10 wallet.xsd
• ac48f10 by @yegor256: no guarantee
• 958d592 by @yegor256: #9 test
• 6c7831e by @yegor256: #9 amount
• adb6bd1 by @yegor256: #9 16 chars per id
• 6a66139 by @yegor256: #9 begin/rescue
• b48c661 by @yegor256: #9 Log::Quiet
• ee45a9e by @yegor256: #9 create instead of init
• b9a2d01 by @yegor256: #8 versions up

Released by Rultor 1.67, see build log