Improve nalgebra-macros/Cargo.toml metadata

nalgebra-macros/Cargo.toml

@@ -1,16 +1,21 @@
 [package]
 name = "nalgebra-macros"
 version = "0.1.0"
-authors = ["Andreas Longva <andreas.b.longva@gmail.com>"]
+authors = [ "Andreas Longva", "Sébastien Crozet <developer@crozet.re>" ]
 edition = "2018"
+description = "Procedural macros for nalgebra"
+documentation = "https://www.nalgebra.org/docs"
+homepage = "https://nalgebra.org"
+repository = "https://github.com/dimforge/nalgebra"
+readme = "../README.md"
+categories = [ "science", "mathematics" ]
+keywords = [ "linear", "algebra", "matrix", "vector", "math" ]
+license = "Apache-2.0"
 
 [lib]
 proc-macro = true
 
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
-
 [dependencies]
-# TODO: Determine minimal features that we need
 syn = { version="1.0", features = ["full"] }
 quote = "1.0"
 proc-macro2 = "1.0"