Part 1 of OrderBook subscription->processing#3

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se-l wants to merge 11 commits intojameschch:bitfinex2from

se-l:bitfinex2-cherrypick

Commits on Jan 2, 2018

Commits on Jan 6, 2018

Fix failing order cancelation due to missing brokerId in ticket
se-l
committed
order update in ws - part1b
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committed
process order updates in ws - part1
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Nonce in auth request compatible with both ws v1.1 and v2

Sebastian Lueneburg
authored and
se-l
committed

Commits on Jan 7, 2018

Merge remote-tracking branch 'lean_jameschch/bitfinex2' into bitfinex2-cherrypick
se-l
committed