Increase max nodes per page.
Increase max nodes per page.

This commit changes the maxNodesPerPage constant so that it is essentially unlimited.
Previously, a single large transaction could create more nodes than the mock array
could handle.

Fixes #188.

xuzhaokui/bolt,joyrexus/bolt,dindinet/bolt-1,pspeter3/bolt,jefby/bolt,Apsalar/bolt,benbjohnson/bolt,wyzssw/bolt,cep21/bolt,btcsuite/bolt,odeke-em/bolt,ngaut/bolt,nilslice/bolt,tv42/bolt,mashuai/bolt,dajohi/bolt,samanalysis/bolt,brahmaroutu/bolt,linearregression/bolt,yew011/bolt,pombredanne/bolt-2,mr-justin/bolt,etcd-io/bbolt,conseweb/bolt,Compasses/bolt,chlorm-forks/bolt,raggi/bolt,lmars/bolt,sysbot/bolt,hvnsweeting/bolt,boltdb/bolt,li-ang/bolt,tvmaly/bolt,jmptrader/bolt