update Cargo.toml

Author: nikomatsakis

Cargo.toml

@@ -1,6 +1,10 @@
 [package]
 name = "datafrog"
 version = "0.1.0"
-authors = ["Frank McSherry <fmcsherry@me.com>"]
+authors = ["Frank McSherry <fmcsherry@me.com>", "The Rust Project Developers", "Datafrog Developers"]
+license = "Apache-2.0/MIT"
+description = "Lightweight Datalog engine intended to be embedded in other Rust programs"
+readme = "README.md"
+keywords = ["datalog", "analysis"]
 
 [dependencies]