adapt curl hiperfifo.c example
properly wrap curl_multi_socket_action

use Libevent in examples/omulti.ml
test perform and socket_all methods
more comments for Curl.Multi functions
use CURL_CSELECT_*, add Unix.select loop to omulti
compile exampels with threads too
+ CURLINFO_LOCAL_IP CURLINFO_LOCAL_PORT
+ pause
release 0.5.5
Revert "Adding omake files. Need work, lots of it."

This reverts commit 4860098121a34fd823fa7a4417477c0ffbc3c316.
configure: more robust test for libcurl

Use pkg-config, fallback to curl-config.
Do not strip -L options from linking flags (ocamlmklib understands them fine)
configure: really test exit status
release 0.5.6
make SSLVERIFYHOST_EXISTENCE equivalent to SSLVERIFYHOST_HOSTNAME

Previous workaround was broken, so better keep it simple.
fix compilation, use events_base
properly use blocking_section for sock_cb
+ Multi.set_timer_function
less allocations on callbacks

multi handle is available from closure at caml side
update example
+ Multi.timeout, check mcode