change uv_fs_read cb signature: use same callback signature as uv_read_cb

add pipe_bind test case

prevent SEGV when throws Fatal error on callback context.

add tcp bind test

remove unused variable

do not initialize ares on startup.

change function signature: uv_udp_recv, uv_udp_recv_start

change function signature. (respects native function signature)

add more error information : uv_shutdown

add error handling

add http parser support:

currently, php-uv has socket handling problem. (https://github.com/chobie/php-uv/issues/5)
if I don't support httpparser. hard to explain it.

for now, force remove resource when calling uv_close

add pending parameter.

PHP_UV_DEBUG should be 0

for now, add uv_read2

fix gethostbyname_cb test

add uv_shutdown

change uv_read_start signature.

fix debug macro

add proto comment for uv_mutex

fix windows compile error

improve uv_mutex functions and add test case

add uv_rwlock test cases and improve uv-rwlock functions

add uv_idle test case

add ares_gethostbyname testcase