Add some metadata and bump the version number

Cargo.toml

@@ -1,5 +1,12 @@
 [package]
 
 name = "gcc"
-version = "0.0.1"
+version = "0.0.2"
 authors = ["Alex Crichton <alex@alexcrichton.com>"]
+license = "MIT/Apache-2.0"
+repository = "https://github.com/alexcrichton/gcc-rs"
+description = """
+A build-time dependency for Cargo build scripts to assist in invoking the native
+C compiler to compile native C code into a static archive to be linked into Rust
+code.
+"""