added libuv to 3rdparty
added untested uv_fs_mkdir_p function .
added uv_fs_seek function
added uv_fs_lock/uv_fs_unlock function
added uv_thread_yield
added uv_thread_exit
added uv_fs_flush function
added uv_fs_getstdin/uv_fs_getstdout/uv_fs_getstderr
small fix for uv_fs_getstd*
updated libuv to latest version
fixed comment
small fixes for libuv
small fixes for uv_fs_mkdir_p
removed some needless ops
removed another needless ops
Merge branch 'libvu3' into gerdr/integration

Conflicts:
	src/core/oplist
	src/core/ops.c
	src/core/ops.h
build libuv on windows