add miscs files.
initially add zklua.c and zklua.h.
add Makefile.
zklua_init completed.
zookeeper_close completed.
add pre-check function.
update zklua.c
zoo_deterministic_conn_order() completed.
add strcasecmp.c, which is not std c utility.
zklua_set_log_stream and zklua_set_debug_level is done.
add zklua utility implementation.
zklua_client_id finished.
zklua_recv_timeout, zklua_get_context and zklua_set_context is done.
zklua_adelete is done.
add zklua.adelete example.
various completions finished.
fix english syntax error.
add docs.
update zklua.lua
add zklua-doc.lua, luadoc compitable doc format.