Make Cargo workspace instead of nested crate

Update some docs and cargo.toml

Author: ian-h-chamberlain

Cargo.toml

@@ -1,18 +1,6 @@
-[package]
-name = "corewa_rs"
-version = "0.1.0"
-authors = ["Ian Chamberlain <[email protected]>"]
-edition = "2018"
+[workspace]
 
-[dependencies]
-itertools = "0.8.0"
-lazy_static = "1.2.0"
-pest_derive = "2.1.0"
-pest = "2.1.0"
-structopt = "0.3.5"
-
-[dev-dependencies]
-assert_cmd = "0.11.1"
-assert_fs = "0.13.1"
-predicates = "1.0.2"
-testutils = { path = "testutils" }
+members = [
+    "corewa_rs",
+    "testutils",
+]

README.md

@@ -2,3 +2,7 @@
 A Rust implementation of [Core Wars](http://www.koth.org/index.html).
 
 The implementation is based on [this introductory guide](http://vyznev.net/corewar/guide.html) to Redcode, as well as the [pMARS '94 reference](http://www.koth.org/info/pmars-redcode-94.txt) and an [annotated version](http://corewar.co.uk/standards/icws94.txt) of the ICWS '94 draft.
+
+## Crates
+* `corewa_rs` - the main implementation
+* `testutils` - some utilities for working with load files and testing complex predicates

corewa_rs/Cargo.toml

@@ -0,0 +1,18 @@
+[package]
+name = "corewa_rs"
+version = "0.1.0"
+authors = ["Ian Chamberlain <[email protected]>"]
+edition = "2018"
+
+[dependencies]
+itertools = "0.8.0"
+lazy_static = "1.2.0"
+pest_derive = "2.1.0"
+pest = "2.1.0"
+structopt = "0.3.5"
+
+[dev-dependencies]
+assert_cmd = "0.11.1"
+assert_fs = "0.13.1"
+predicates = "1.0.2"
+testutils = { path = "../testutils" }