shrink_to_fit after removing hashes.

Fixes #576

support for rpc polling

limit serde codegen only to rpc types submodule

fork test for Issue test/568

Fixing clippy warnings = small refactoring of `request_blocks`

Improved journaldb logging

Additional check to ancient enactments.

Conflicts:
	ethcore/src/tests/client.rs

chainfilter shouldnt exclude to_block from results

Fix coverage test run

Mining

fix uint warnings

Finished blockchain generator.