parallel: Update Cargo.toml

Author: bluss

parallel/Cargo.toml

@@ -2,6 +2,14 @@
 name = "ndarray-parallel"
 version = "0.1.0"
 authors = ["bluss"]
+license = "MIT/Apache-2.0"
+
+repository = "https://github.com/bluss/rust-ndarray"
+documentation = "https://docs.rs/ndarray-parallel/"
+
+description = "Parallelization for ndarray (using rayon)."
+
+keywords = ["data-structure", "multidimensional", "parallel", "concurrent"]
 
 [dependencies]
 rayon = "0.6"