allow argument to set/get/getNext to be a numeric OID in addition to a
'tag.iid'. if the input arg is a numeric OID then getNext would return a
numeric OID as well.

add a 'getType' method to lookup SNMP type(syntax) for a given object so
some formatting of retrieved value can be done for packed types like
(OCT_STR, IP_ADDR, OID etc.) currently you must know what type you are
getting back and unpack accordingly.

I think the error handling is fixed now - but it could use some
validation/going over. See that informative strings are returned and the
the error number is useful in all cases.

implement an asynchronous interface so multiple requests can be sent out
and responses can be handled with a call-back.

implement more v2-isms. (assuming some stability and consensus on what
that is)





