* Update CHANGELOG for 1.6.9 stable release.
* [WIP] Prepare CHANGELOG for 1.7.0 beta release.
* Contract warp
* Update changes for 1.7.0
* Update description for 1.7.0 in changelog
* Update Changelog for 1.7.0 beta and 1.6.10 stable
* Address reviews for the Changelog.
* Fix blog URL in changelog.
* Fix typo in Changelog.
* Update changelog for 1.7.0 beta and 1.6.10 stable
* 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
* generate proofs on newly-created state
* report only missed steps after first block
* dont report skipped if not signer
* test
* finality tracing and passing valid header to `commit_block`
* avoid proposing multiple times on the same step when validator set changes
* limit benign reports
* Ordering -> AtomicOrdering
* reinstate warning now that spam is reduced
* flush pending transition changes when necessary
* ensure epochs aren't re-zoomed on every block
