fix #19 add -lrt flag to CPPFLAGS

also you need to add `CPP_FLAGS += -fPIC` to `libuv/Makefile` if you use 64bit system.
OSX doesn't have -lrt.
sigh, i should sleep today.
win32: remove needless ifndef block
fixed NTS build, plus

- extended config.w32 to look for libs/includes in extra dirs
- fixed config.w32 to care about the sockets ext
- --enable-uv-httpparser is a better wording
- since non bundled library can be used, wording fixed in minfo
finer sockets ext check
Update README.md

Adds missing language declaration for code highlighting.
Added missing constants
Merge pull request #29 from csaoh/fix_constants

Added missing constants
Merge pull request #27 from baileylo/patch-1

Update README.md
Fix S_IRGRP value
Added a length parameter to read
Fixed indentation
Merge pull request #30 from csaoh/fix_constants

Fix S_IRGRP value + Added a length parameter to fs_read
Merge pull request #26 from weltling/master

Windows fixes
update latest libuv and http-parser

Notes: ares functions are removed as uv removed that features. please use before commit
if you want to use ares features. currently, php ares extension seems not maintained.
please ask me when you met some troubles about ares feature.
Updated README.md

I forgot to update the doc about uv_fs_read
Also fixed 2 typo errors
Merge pull request #32 from csaoh/patch-1

Updated README.md