add documentation about snapshots
add documentation about snapshots
chjj/rocksdown,ralphtheninja/leveldown,No9/leveldown,jhead/leveldown,Level/rocksdb,Level/leveldown-mobile,mafintosh/leveldown-prebuilt,jmanero/flat-rocks,juliangruber/a-native-module-without-prebuild,No9/leveldown,phillipj/leveldown,Level/leveldown-mobile,gastrodia/leveldown,gastrodia/leveldown,MathieuCassagne/leveldown,mafintosh/leveldown-prebuilt,jmanero/flat-rocks,phillipj/leveldown,mafintosh/leveldown-prebuilt,Level/rocksdb,jmanero/flat-rocks,No9/leveldown,juliangruber/a-native-module,MathieuCassagne/leveldown,ralphtheninja/leveldown,Level/leveldown,timkuijsten/leveldown,juliangruber/a-native-module-without-prebuild,jhead/leveldown,juliangruber/a-native-module-without-prebuild,MathieuCassagne/leveldown,phillipj/leveldown,phillipj/leveldown,phillipj/leveldown,MathieuCassagne/leveldown,Level/leveldown-mobile,juliangruber/a-native-module-without-prebuild,chjj/rocksdown,jhead/leveldown,Level/leveldown-mobile,ralphtheninja/leveldown,jmanero/flat-rocks,timkuijsten/leveldown,gastrodia/leveldown,gastrodia/leveldown,Level/leveldown,juliangruber/a-native-module,gastrodia/leveldown,mafintosh/leveldown-prebuilt,timkuijsten/leveldown,ralphtheninja/leveldown,chjj/rocksdown,No9/leveldown,jhead/leveldown,timkuijsten/leveldown,timkuijsten/leveldown,mafintosh/leveldown-prebuilt,Level/leveldown-mobile,juliangruber/a-native-module,juliangruber/a-native-module,juliangruber/a-native-module-without-prebuild,ralphtheninja/leveldown,No9/leveldown,Level/rocksdb,jmanero/flat-rocks,chjj/rocksdown,juliangruber/a-native-module,jhead/leveldown,MathieuCassagne/leveldown,Level/leveldown