v0.1.8: Release 0.1.8

 * Fix. Crash on LuaJIT when raise Lua error inside callback.
 * Fix. Crash when bind for pipe without callback.
 * Fix. correct type name in error message.
 * Add. `cofs` module
 * Add. `getpeername` function to LuaSocket module
 * Add. uv.fs_access accept flag as name.
 * Add. `read_line_eol` method and `*L` read pattern to buffer class and to LuaSocket.
 * Add. Support of `uv_pipe_chcmod` method
 * Add. Support of `uv_os_getppid` function
 * Add. Support of `uv_if_indextoname` and `uv_if_indextoiid` functions
 * Add. `pipe:ipc()` method to get `uv_pipe_t.ipc` flag.