* kvdb-rocksdb: update to RocksDB 5.8.8
* kvdb-rocksdb: tune RocksDB options
* Switch to level-style compaction
* Increase default block size (16K), and use bigger blocks for HDDs (64K)
* Increase default file size base (64MB SSDs, 256MB HDDs)
* Create a single block cache shared across all column families
* Tune compaction settings using RocksDB helper functions, taking into account
memory budget spread across all columns
* Configure backgrounds jobs based on the number of CPUs
* Set some default recommended settings
* ethcore: remove unused config blockchain.db_cache_size
* parity: increase default value for db_cache_size
* kvdb-rocksdb: enable compression on all levels
* kvdb-rocksdb: set global db_write_bufer_size
* kvdb-rocksdb: reduce db_write_bufer_size to force earlier flushing
* kvdb-rocksdb: use master branch for rust-rocksdb dependency
* separate migration from util and make its dependencies into libs:
* snappy
* kvdb
* error
* common
* renamed common -> macros
* util error does not depend on snappy module
* ethsync does not depend on util nor ethcore_error
* nibbleslice and nibblevec merged with patricia_trie crate
* removed unused dependencies from util
* util journaldb traits does not need to be public
* util_error
* fixed ethcore compile error
* ignore .swo files
* Update chain.rs
* Create new column family for local node info
* remove DBTransaction::new reliance on DB
* KeyValueDB trait
* InMemory KeyValueDB implementation
* journaldb generic over KVDB
* make most of `ethcore` generic over KVDB
* fix json tests compilation
* get all tests compiling
* implement local store (just for transactions)
* finish local store API, test
* put everything into place
* better test for skipping bad transactions
* fix warning
* update local store every 15 minutes
* remove superfluous `{}`s
* flush work
* flush work
* flush work
* flush work
* generalized notifiers
* general setup with modules
* general setup with modules
* all binded
* catch up with master
* all dependencies injected
* stratum another up
* tcp update
* submitwork routine
* finalize & fix warnings
* merge bugs, review fixes
* merge bugs, review fixes
* new cli mess cleanup
* usage.txt swap
* flush work
* cli adopt
* compilation with new cli sorted
* subid space in json
* serialization issues
* grumbles addressed
* more grumbles
* remove last_work note for now
* fix compilation
* fix tests
* merge bugs
* no obliged ipc
* moving notifiers
* no optional feature now
* refactored again
* working on tests
* refactor to new tcp/ip
* stratum lib ok
* ethcore crate ok
* wip on tests
* final test working
* fix warnings, \n-terminated response
* new compatibility
* re-pushing work once anybody submitted
* various review and general fixes
* reviewe fixes
* remove redundant notifier
* one symbol -> huge bug
* ensure write lock isn't held when calling handlers
* extern declarations moved
* options to stratum mod, SocketAddr strongly-typed instantiation
* Minor style fix.
* Whitespace and phrasing
* Whitespace
* add auto compaction types
* pass db paths
* detect drive type on Linux
* use base db path
* add docstring
* limit the test to be side effect free
* use base db path
* more docs
* fix parsing test
* update error
* detect only on Linux
* make test Linux only
* add second device letter, update cli doc
* use spaces in cli doc
* import only on linux
* default->auto