Implement skeleton install utility

Add install utility skeleton source, based on
mv, including the getopts setup mirroring
GNU's `man install` documentation.  Also
add a single test and build system code.

tests/test_install.rs

@@ -0,0 +1,21 @@
+extern crate libc;
+extern crate time;
+extern crate kernel32;
+extern crate winapi;
+extern crate filetime;
+
+use self::filetime::*;
+use common::util::*;
+
+static UTIL_NAME: &'static str = "install";
+
+#[test]
+fn test_install_help() {
+    let (at, mut ucmd) = testing(UTIL_NAME);
+
+    let result = ucmd.arg("--help").run();
+    assert_empty_stderr!(result);
+    assert!(result.success);
+
+//    assert!(result.stdout.contains("Usage:"));
+}

tests/tests.rs

@@ -27,6 +27,7 @@ macro_rules! unix_only {
 unix_only! {
     "chmod", test_chmod;
     "chown", test_chown;
+    "install", test_install;
     "mv", test_mv;
     "pathchk", test_pathchk;
     "stdbuf", test_stdbuf;