* RPC errors & logs (#1845)
* Refactoring errors in RPC
* Updating jsonrpc-core
* Fixing code_at
* Avoid mentioning obvious segments in proof
[ci:skip]
* fixed cache_manager lock order
* Purging .derefs, fixing clippy warnings. (#1890)
* Fixing clippy warnings
* Purging derefs
* Simplifying engine derefs
* Simplifying more engine derefs
* Adding more details to miner log
* fixed#1889, .DS_Store is no longer treated as key file (#1892)
* fixed#1889, .DS_Store is no longer treated as key file
* ethstore filters directories, hidden files and common system files
* fixed compiling
* fix regression with geth dir
* fix regression with geth dir
* Fix ipc compilation and add ipc feature to test targets (#1902)
* fix compilation and add it to the ci run
* no separator?
* use quotes and spaces
* RocksDB version bump
* Don't return deleted nodes that are not yet flushed (#1908)
* polling & connection timeouts (#1910)
* Peers RPC + UI displaying active/connected/max peers (#1915)
* Peers API
* Bumping Parity-UI
* Fixing tests
* Save nodes removed from backing_overlay until commit (#1917)
* Consolidation migration
* Started db amalgamation
* Using client constants for columns
* Adding with_columns constructor
* Migrating to single db
* Fixing tests.
* test.sh without verbose
* Fixing warnings
* add migration tests that catch the bug
* make multiple migrations more robust
* add moved v9
* Merge branch 'noop-migrations' into single-db
* spurious line
* clean up migrations ordering
* update comment [ci skip]
* Bumping default number of max_open_files & re-ordering columns.
* fix merge
* fix ignored analysis tests
* Caching best block content
* Faster best_block_header
* Adding progress to v8 migration
* clean up warnings
* Separate hashes and bodies in the DB
* Separate hashes and bodies in the DB
* Fixed tests
