Fix read-ahead bug.

Re-ahead 8 bytes rather than 3 to ensure large blocks import fine.

firewall rules for windows installer

x64 program files path for installer

* Deactivate peer if it has no new data

* Fixed node table timer registration

* Fixed handshake timeout expiration

* Extra trace

* Fixed session count calculation

* Only deactivate incapable peers in ChainHead state

* Timer registration is not needed

* fixed #1261, overflow when calculating work

* tests for difficulty_to_boundary

* return !U256::zer() for boundary <= 1

clarify build instructions

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fixed #1255

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* Restrict network key file permissions

* Check for overflow in str to bigint conversion

* RLP decoder overflow check

windows installer + parity start ui cli option

ipc lib version bump

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Syncing improvements

removed redundant if condition