Restructure according to Cargo doc

Cargo.toml

@@ -3,14 +3,6 @@ name = "fd"
 version = "0.3.0"
 authors = ["David Peter <mail@david-peter.de>"]
 
-[[bin]]
-name = "fd"
-path = "src/bin/main.rs"
-
-[lib]
-name = "fd"
-path = "src/fd.rs"
-
 [dependencies]
 ansi_term = "0.9"
 getopts = "0.2"

src/fd.rs

@@ -1,7 +0,0 @@
-extern crate ansi_term;
-extern crate getopts;
-extern crate isatty;
-extern crate regex;
-extern crate ignore;
-
-pub mod lscolors;

src/main.rs

@@ -3,7 +3,8 @@ extern crate getopts;
 extern crate isatty;
 extern crate regex;
 extern crate ignore;
-extern crate fd;
+
+pub mod lscolors;
 
 use std::env;
 use std::error::Error;
@@ -17,7 +18,7 @@ use isatty::stdout_isatty;
 use regex::{Regex, RegexBuilder};
 use ignore::WalkBuilder;
 
-use fd::lscolors::LsColors;
+use lscolors::LsColors;
 
 /// Configuration options for *fd*.
 struct FdOptions {