* update back-references more aggressively after answering from cache (#7578)
* Add new EF ropstens nodes. (#7824)
* Add new EF ropstens nodes.
* Fix tests
* Add a timeout for light client sync requests (#7848)
* Add a timeout for light client sync requests
* Adjusting timeout to number of headers
* Flush keyfiles. Resolves#7632 (#7868)
* Fix wallet import (#7873)
* rpc: generate new account id for imported wallets
* ethstore: handle duplicate wallet filenames
* ethstore: simplify deduplication of wallet file names
* ethstore: do not dedup wallet filenames on update
* ethstore: fix minor grumbles
* [WASM] mem_cmp added to the Wasm runtime (#7539)
* mem_cmp added to the Wasm runtime
* schedule.wasm.mem_copy to schedule.wasm.mem_cmp for mem_cmp
* [Wasm] memcmp fix and test added (#7590)
* [Wasm] memcmp fix and test added
* [Wasm] use reqrep_test! macro for memcmp test
* wasmi interpreter (#7796)
* adjust storage update evm-style (#7812)
* disable internal memory (#7842)
* rpc: transaction/receipt requests made async
* rpc: light client fetches transaction and uncle by hash/index
* on_demand: request type for transaction index
* serve transaction index requests in light protocol
* add a test for transaction index serving
* fetch transaction and receipts by hash on light client
* fix decoding tests
* light: more lenient cost table parsing (backwards compatible)
* fix tests and warnings
* LES -> PIP
* Update provider.rs
* proper doc comments for public functions
* 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
* fixed naming of rlp modules
* RlpStream cleanup
* appending short rlp lists (0...55 bytes) is 25% faster
* RlpStream does not use bytes module, nor trait Stream
* removed unused code from rlp module
* compiling ethcore-util with new rlp serialization
* compiling parity with new rlp serialization
* fixed compiling ethcore-light with new rlp serialization
* fixed compiling ethsync with new rlp serialization
* removed redundant comment, print
* removed redundant double-space
* replace usage of WriteBytesExt with ByteOrder
