Add optional parameter to limit liquidity to be put on order

[Desrever Nu]

With the current configurations, all funds are put into orders, in the t2-tail.

This will make it impossible for a custodian to have multiple bots on the same account (on different pair).

Need to make it possible via config param

[Desrever Nu]

two parameters are needed , one per side. Total NBT amount to put on order such that t1+t2<= limit

 "bookSellMaxVolumeCumulative" : 2000,
 "bookBuyMaxVolumeCumulative" : 2000,

[Desrever Nu]

0 = nolimit, default 0,