Boolparser

Resolve boolean expressions to a true/false result. Primarily used as the basis for a more comprehensive version of mutlisig.

eg. "2 of 3 mutlisig" would be replaced with "t1 + t2 + t3 > 1" (where t1-3 are trustee signers, and get replaced with either a 0 or 1)

See bool_test.go for more examples.