Blockchain sync minor fixes

Mix - bug fixes

Tests for constructor arguments "from outside".

bc_rf

Conflicts:
libethereum/BlockChainSync.cpp
libethereum/BlockChainSync.h

Reduce verbosity.

Fix and test for not really recursive structs.

clean windows build

VM: refactor and fix undefined behavior around data to memory copy

Blockchain sync refactoring

OpenCL: Always try single chunk DAG upload

Fixed nodes format string.

Fixes #2156

Cleanup of SecretStore.

Fixes #2223.

make network test optional

Small override & std::move fixes

Accessors for strings and type conversion to memory.

std::memcpy and std::memset cannot be called with invalid pointers even when the size to be copi...

Added documentation, more failure checking and some general cleanup.

- Removed the `--force-single-chunk` option

- Always attempt to create a single chunk DAG buffe...

bc_rf

Conflicts:
libethereum/BlockChain.cpp

KeyManager refactoring to increase readability.

FuzzTests

ImportRoute class instead of pair

false positive test for bloom filter

bc_rf

Conflicts:
libethereum/EthereumHost.cpp

Corrected typo about max peer count.

Add cmake command to turn CL Kernel code into a byte array

Pow tests

bloom filter

Storage array reference test.

- The script to turn the source into a bytearray header is no longer a
function but is instead...