* refactor PriceInfo to use Fetch and reuse the client
* forget Fetch future to keep it running in the background
* update Debug message for price_info::Client
* wrap underlying errors in price_info client
* use debug_struct in price_info client debug implementation
* use global fetch service in price_info client
* rename gas_pricer parameter in RunCmd
* move price_info to its own crate
* fix price_info tests
* replace rustc_serialize with serde_json in price_info
* add documentation for price_info
* remove unused rustc-serialize dependency from ethcore
* fix price_info formatting
* re-export fetch crate in price_info
* remove unused cfg attributes in price_info
* add tests for price_info
* whisper skeleton
* basic message store
* rallying and message logic
* pass host info to network protocol handlers
* choose who starts rally based on node key
* module reshuffling
* mining messages
* prune messages by low PoW until below size target
* associated error type for ethkey generators and `OsRng` generator
* beginnings of RPC
* generic message handler for whisper
* reshuffle code order
* standard payload encoding and decoding
* basic crypto
* minor restructuring of net code
* implement shh_post
* merge?
* implement filters
* rand trait for hash types
* filter RPCs for whisper
* symmetric encryption of payload
* pub-sub
* filter tests
* use only secure random IDs
* attach arbitrary protocols to network
* basic integration of whisper into Parity
* eagerly prune low PoW entries
* broadcast messages with salted topics
* node info RPC
* fix import
* fix leading zeros calculation
* address minor grumbles
* Health endpoint.
* Asynchronous health endpoint.
* Configure time api URL via CLI.
* Tests for TimeChecker.
* Health indication on Status page.
* Adding status indication to tab titles.
* Add status to ParityBar.
* Fixing lints.
* Add health status on SyncWarning.
* Fix health URL for embed.
* Nicer messages.
* Fix tests.
* Fixing JS tests.
* NTP time sync (#5956)
* use NTP to check time drift
* update time module documentation
* replace time_api flag with ntp_server
* fix TimeChecker tests
* fix ntp-server flag usage
* hide status tooltip if there's no message to show
* remove TimeProvider trait
* use Cell in FakeNtp test trait
* share fetch client and ntp client cpu pool
* Add documentation to public method.
* Removing peer count from status.
* Remove unknown upgrade status.
* Send two time requests at the time.
* Revert "Send two time requests at the time."
This reverts commit f7b754b1155076a5a5d8fdafa022801fae324452.
* Defer reporting time synchronization issues.
* Fix tests.
* Fix linting.
* do more validation of imported headers in light client
* generalize informant with traits
* informant implementation for light client
* make comment into TODO
* fix broken test
* disable full checking of headers in light client in sync tests
* header back-references for on demand
* initial back-reference implementation for on demand requests
* answer requests from cache
* answer requests from cache, add tests
* strongly typed responses for vectors of homogeneous requests
* fix fallout in RPC without optimizing
