* Migrating to new syntex

* Updating to latest syntex

* Another fix for nightly

* EIP198 and built-in activation

* address review

* Changing Mutex into RwLock for transaction queue

* Fixing merge

* little fix

* 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

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

* updated required compiler version message

* fixed typo

* First little bits for chain-selection.

* Provide RPCs and get settings through to user defaults.

* Hasty stash.

* Fix updater accidentally redownloading.

* Finish up.

* Add JS tests.

* Hypervisor should never run a binary modified before itself.

* Style.

* Help tweak.

* Fix test compile.

* Fix JS test

* Build fix for tests.

* Revert default chain name

* Another test

* Use spec name via client.

* Fix mock up.

* whitespace

[ci:skip]

* whitespace

[ci:skip]

* remove exit/restart endpoints.