* make on_connect/disconnect public
* free flow params constructor
* Shared ownership of LES handlers
* light provider impl for test client
* skeleton for testing light sync
* have test_client use actual genesis
* fix underflow in provider
* test harnesses for lightsync
* fix tests
* fix test failure caused by test_client changes
* owning views of blockchain data
* port blockchain and client traits to owning views
* fix ethcore tests
* use strong headers and bodies in ethcore_light
* port ethsync to use owning views
* port rpc to owning views
* port parity informant and blockchain export
* light: basic transaction pool
* light: network timeouts
* fix dead code warnings
* les: update to new message format
* fix indentation
* les: hash or number in headers req, not both
