v3.0.0-rc1

Changed

• Upgrade levelup from ^1.2.1 to ^3.0.1 (@ralphtheninja)
• Upgrade abstract-leveldown from ^2.4.1 to ^5.0.0 (@ralphtheninja)
• Upgrade memdown devDependency from ^1.1.0 to ^3.0.0 (@ralphtheninja)
• Upgrade tape devDependency from ^4.2.2 to ^4.9.0 (@ralphtheninja)
• Upgrade standard devDependency from ^5.3.1 to ^11.0.1 (@ralphtheninja)
• Update links in package.json (@ralphtheninja)
• Replace util.inherits with inherits module (@ralphtheninja)
• SubIterator should inherit from AbstractIterator (@ralphtheninja)
• Use underscore methods to properly override (@ralphtheninja)
• Change SubDown#type from subdown to subleveldown (@ralphtheninja)
• Rewrite SubDown#_open to handle any inner *downs (@ralphtheninja)
• Update sublevel specific tests to handle levelup + encoding-down (@ralphtheninja)
• Update README (@ralphtheninja, @vweevers)

Added

• Depend on encoding-down for encoding logic (@ralphtheninja)
• Add node 6, 8, 9 and 10 to Travis (@ralphtheninja)
• Test SubDown constructor (@ralphtheninja)
• Test main subdb (@ralphtheninja)
• Test encodings (@ralphtheninja)
• Test wrapping a closed levelup and re-opening it (@ralphtheninja)
• Test nested sublevels (@ralphtheninja)
• Add temporary down() and isAbstract() functions (@ralphtheninja)
• Add UPGRADING.md (@ralphtheninja)

Removed

• Remove node 0.12 from Travis (@ralphtheninja)
• Remove SubDown#destroy (@ralphtheninja)
• Remove SubDown#repair (@ralphtheninja)
• Remove SubDown#setDb (@ralphtheninja)
• Remove SubDown#approximateSize (@ralphtheninja)
• Remove SubDown#getProperty (@ralphtheninja)

Fixed

• Fix deprecated new Buffer() (@ralphtheninja)