Added consistency with library:

as.Key is renamed to as.NewKey (because NewKey is the name of the function)
client(host string, port int) is renamed to NewClient(host string, port int) - (because NewClient is the name of the function)
Added functions such as GetString, GetInt, GetInterface, GetStringArray, GetIntArray, GetInterfaceArray for easy value retrieval.
According to the JavaDoc available at http://www.aerospike.com/apidocs/java/com/aerospike/client/Record.html this is not uncommon.
Merge branch 'master' of github.com:EtienneBruines/aerospike-client-go