add infoAll method to simplify receiving multiple info responses
add infoAll method to simplify receiving multiple info responses

resolves aerospike/aerospike-client-nodejs#43

aerospike/aerospike-client-nodejs,aerospike/aerospike-client-nodejs,aerospike/aerospike-client-nodejs,aerospike/aerospike-client-nodejs,aerospike/aerospike-client-nodejs