Add windows support

[owenthereal]

No description provided.

[owenthereal]

@mattn Would the use of github.com/mattn/go-isatty & github.com/mattn/go-colorable make cross compile impossible? I'm planning to let Travis CI (Linux) to cross compile ccat and provide builds for all platforms. People seem to be struggling with compiling it from source, e.g., #1

[owenthereal]

The code is actually working on Windows! But looks like the color is different from *nix's. Any way to tweak github.com/mattn/go-colorable?

[phase]

@jingweno What shell are you using?

[owenthereal]

@phase The git shell which should be a powershell.

[mattn]

go-isatty, go-colorable both are multi-platform compatible.

[mattn]

The code is actually working on Windows! But looks like the color is different from *nix's. Any way to tweak

Because your background color is blue, and windows console can display only 8 x 2(light/dark) colors.

[owenthereal]

Alright, let's merge this 👍