* Changing Mutex into RwLock for transaction queue

* Fixing merge

* little fix

* no max sealing when external

* force internal sealing

* Attach hardware wallets already in addressbook

* Only set values changed

* 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

It throws a certificate error on HTTPS because the certificate is only valid on parity.io.

Don't remove confirmed requests to early.

Ensure sealing work enabled in miner once subscribers added

Bump nanomsg

Bumping multihash and libc

* Fix typo

* Add Value capabilities to Contract Deployment

* Add Extras settings for Contract Deployment (#4483)

* Fix deploy in API

update coverage for RUST&JS
[ci skip]

* add reseal max period

* fix rpc

* Detect rust compiler version in Parity build script, closes #4742

* updated required compiler version message

* fixed typo