FIX bitflags depedency

Cargo.lock

@@ -3,6 +3,7 @@ name = "exa"
 version = "0.1.0"
 dependencies = [
  "ansi_term 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bitflags 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "datetime 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "getopts 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "git2 0.1.20 (registry+https://github.com/rust-lang/crates.io-index)",

Cargo.toml

@@ -16,6 +16,7 @@ natord = "1.0.7"
 number_prefix = "0.2.3"
 pad = "0.1.1"
 users = "0.2.3"
+bitflags = "0.1"
 
 [features]
 default = [ "git" ]