Relicense as MIT/Apache-2.0

Closes #83.

Author: mbrubeck

Cargo.toml

@@ -2,7 +2,7 @@
 name = "smallvec"
 version = "0.6.1"
 authors = ["Simon Sapin <[email protected]>"]
-license = "MPL-2.0"
+license = "MIT/Apache-2.0"
 repository = "https://github.com/servo/rust-smallvec"
 description = "'Small vector' optimization: store up to a small number of items on the stack"
 keywords = ["small", "vec", "vector", "stack", "no_std"]