windows: update uv_fs_* functions to work with req.path

windows: use _stati64

unix: Set req->result to -1 on async uv_fs_readdir error

fixes test/simple/test-fs-error-messages.js in node.

win: initialize req.path = NULL.

Open files with sharing enabled. Fixes node's issue #1449.

https://github.com/joyent/node/issues/1449

Add uv_fs_t.path on unix and tests

Windows implementation missing https://github.com/joyent/libuv/issues/177

unix: uv_fs_readdir sync skips . and ..

Fixes test fs_async_dir

Add test for uv_fs_readdir sync

unix: fix fs_chmod

test: fix uv_fs_readdir test

Don't make assumptions about the order in which the
directory entries are returned by the file system.

Fix warning on darwin

unix: implement uv_fs_readlink

Bring inline with node common.gypi.

Win32 readlink()

windows: uv_fs_link + uv_fs_symlink

win: rename uv_loop_t.ares_channel to ares_chan to avoid confusing g++

Make getsockname/getpeername handle uninitialized sockets better

Specialize uv_xxx_getsockname, add uv_tcp_getpeername

unix: fix warning: implicit declaration of function ‘strerror’

unix: fix warning: implicit declaration of function ‘memcpy’

windows: correct a preprocessor typo

GCC chokes on ##name## concatenation (since . and prepare are invalid
tokens)

windows: implement missing fs functions

Fix MinGW build

Allow `make all` work under MinGW. Remove references to eio for MinGW.

Fixes #170
Fixes #171

implement uv_fs_utime

unix/fs.c: Apply macro magic, implement symlink, link, chown, fchown

add test fs_chmod, implement uv_fs_fchmod and uv_fs_chmod on unix