Merge branch 'master' of github.com:contain-rs/bit-set

diff --combined Cargo.toml
index 99ec08ca069dd28e8df56bb579379b814dfe371c,a29a84433e7869a36f4a58bba46c086d3fc9c560..4a65676692f5abb5a22025658d46be654c98d454
--- 1/Cargo.toml
--- 2/Cargo.toml
+++ b/Cargo.toml
@@@ -1,6 -1,6 +1,6 @@@
  [package]
  name = "bit-set"
 -version = "0.5.0"
 +version = "0.5.1"
  authors = ["Alexis Beingessner <a.beingessner@gmail.com>"]
  license = "MIT/Apache-2.0"
  description = "A set of bits"
@@@ -14,10 -14,9 +14,9 @@@ readme = "README.md
  rand = "0.3"
  
  [dependencies.bit-vec]
- version = "0.5.0"
+ version = "0.6.1"
  default-features = false
  
  [features]
  default = ["std"]
- nightly = ["bit-vec/nightly"]
  std = ["bit-vec/std"]