* Use upstream rocksdb
…by way of https://github.com/paritytech/parity-common/pull/257 by @ordian.
* Hint at how `parity db reset` works in the error message
* migration-rocksdb: fix build
* Cargo.toml: use git dependency instead of path
* update to latest kvdb-rocksdb
* fix tests
* saner default for light client
* rename open_db to open_db_light
* update to latest kvdb-rocksdb
* moar update to latest kvdb-rocksdb
* even moar update to latest kvdb-rocksdb
* use kvdb-rocksdb from crates.io
* Update parity/db/rocksdb/helpers.rs
* add docs to memory_budget division
* Update `add_license` script
* run script
* add `remove duplicate lines script` and run it
* Revert changes `English spaces`
* strip whitespaces
* Revert `GPL` in files with `apache/mit license`
* don't append `gpl license` in files with other lic
* Don't append `gpl header` in files with other lic.
* re-ran script
* include c and cpp files too
* remove duplicate header
* rebase nit
* secret_store: remove kvdb_rocksdb dependency
* cli: init db mod for open dispatch
* cli: move db, client_db, restoration_db, secretstore_db to a separate mod
* migration: rename to migration-rocksdb and remove ethcore-migrations
* ethcore: re-move kvdb-rocksdb dep to test
* mark test_helpers as test only and fix migration mod naming
* Move restoration_db_handler to test_helpers_internal
* Fix missing preambles in test_helpers_internal and rocksdb/helpers
* Move test crates downward
* Fix missing docs
* cli, db::open_db: move each argument to a separate line
* Use featuregate instead of dead code for `open_secretstore_db`
* Move pathbuf import to open_secretstore_db
Because it's only used there behind a feature gate
