https://github.com/antirez/linenoise/pull/76

https://github.com/antirez/linenoise/pull/70

Now we can test the Editor!

libc does not define the STDIN_FILENO & STDOUT_FILENO for the windows
platform.  We instead check whether or not stdin and stdout are TTY
by checking the GetConsoleMode output.

Instead of using custom path to module in lib.rs, load modules for different tty
platforms in tty/mod.rs

Terminal trait is defined in tty/common.rs where it requires
implementation of enable_raw_mode and disable_raw_mode.  readline_edit
will now move around a mutable reference to a Terminal instead of the
platform specific struct.

In order to support the windows platform, we will split the platform
specific logic into the tty directory.