Fix formatting of HISTORY.md (#1126)
Fix formatting of HISTORY.md (#1126)

A couple "New Features" headers needed a blank line before them.
ryneli/rocksdb,wat-ze-hex/rocksdb,wenduo/rocksdb,Andymic/rocksdb,vmx/rocksdb,vmx/rocksdb,norton/rocksdb,SunguckLee/RocksDB,tsheasha/rocksdb,OverlordQ/rocksdb,jalexanderqed/rocksdb,norton/rocksdb,jalexanderqed/rocksdb,norton/rocksdb,bbiao/rocksdb,facebook/rocksdb,tsheasha/rocksdb,tsheasha/rocksdb,SunguckLee/RocksDB,bbiao/rocksdb,wat-ze-hex/rocksdb,norton/rocksdb,ryneli/rocksdb,vmx/rocksdb,wat-ze-hex/rocksdb,hobinyoon/rocksdb,tsheasha/rocksdb,SunguckLee/RocksDB,Andymic/rocksdb,wat-ze-hex/rocksdb,OverlordQ/rocksdb,SunguckLee/RocksDB,facebook/rocksdb,wenduo/rocksdb,ryneli/rocksdb,Andymic/rocksdb,SunguckLee/RocksDB,hobinyoon/rocksdb,bbiao/rocksdb,norton/rocksdb,OverlordQ/rocksdb,hobinyoon/rocksdb,Andymic/rocksdb,vmx/rocksdb,OverlordQ/rocksdb,OverlordQ/rocksdb,wat-ze-hex/rocksdb,OverlordQ/rocksdb,Andymic/rocksdb,wenduo/rocksdb,hobinyoon/rocksdb,SunguckLee/RocksDB,OverlordQ/rocksdb,ryneli/rocksdb,facebook/rocksdb,facebook/rocksdb,SunguckLee/RocksDB,Andymic/rocksdb,jalexanderqed/rocksdb,jalexanderqed/rocksdb,bbiao/rocksdb,tsheasha/rocksdb,tsheasha/rocksdb,hobinyoon/rocksdb,wenduo/rocksdb,ryneli/rocksdb,wenduo/rocksdb,norton/rocksdb,facebook/rocksdb,bbiao/rocksdb,jalexanderqed/rocksdb,wenduo/rocksdb,norton/rocksdb,SunguckLee/RocksDB,vmx/rocksdb,facebook/rocksdb,bbiao/rocksdb,hobinyoon/rocksdb,ryneli/rocksdb,norton/rocksdb,vmx/rocksdb,hobinyoon/rocksdb,Andymic/rocksdb,tsheasha/rocksdb,bbiao/rocksdb,wat-ze-hex/rocksdb,jalexanderqed/rocksdb,hobinyoon/rocksdb,wenduo/rocksdb,facebook/rocksdb,wenduo/rocksdb,wat-ze-hex/rocksdb,vmx/rocksdb,facebook/rocksdb,tsheasha/rocksdb,ryneli/rocksdb,jalexanderqed/rocksdb,Andymic/rocksdb,wat-ze-hex/rocksdb,vmx/rocksdb,bbiao/rocksdb