Remove dependency on brev, bump version

Cargo.toml

@@ -1,10 +1,7 @@
 [package]
 name = "j"
-version = "0.1.1"
+version = "0.1.2"
 authors = ["Casey Rodarmor <casey@rodarmor.com>"]
 license = "WTFPL/MIT/Apache-2.0"
 description = "a command runner"
 homepage = "https://github.com/casey/j"
-
-[dependencies]
-brev = "0.1.6"

src/main.rs

@@ -1,5 +1,17 @@
-#[macro_use]
-extern crate brev;
+macro_rules! warn {
+  ($($arg:tt)*) => {{
+    extern crate std;
+    use std::io::prelude::*;
+    let _ = writeln!(&mut std::io::stderr(), $($arg)*);
+  }};
+}
+macro_rules! die {
+  ($($arg:tt)*) => {{
+    extern crate std;
+    warn!($($arg)*);
+    std::process::exit(-1)
+  }};
+}
 
 #[derive(PartialEq, Clone, Copy)]
 enum Make {