Add some scaffolding for building more crates.

The src/tools directory contains the cretonne-tools crate which will build
binaries for testing cretonne.

The src/libctonfile directory contains the ctonfile library crate which
provides reading and writing of .cton files.

src/tools/Cargo.lock

@@ -0,0 +1,19 @@
+[root]
+name = "cretonne-tools"
+version = "0.0.0"
+dependencies = [
+ "cretonne 0.0.0",
+ "ctonfile 0.0.0",
+]
+
+[[package]]
+name = "cretonne"
+version = "0.0.0"
+
+[[package]]
+name = "ctonfile"
+version = "0.0.0"
+dependencies = [
+ "cretonne 0.0.0",
+]
+

src/tools/Cargo.toml

@@ -0,0 +1,14 @@
+[package]
+authors = ["The Cretonne Project Developers"]
+name = "cretonne-tools"
+version = "0.0.0"
+description = "Binaries for testing the Cretonne library"
+publish = false
+
+[[bin]]
+name = "cretonne"
+path = "main.rs"
+
+[dependencies]
+cretonne = { path = "../libcretonne" }
+ctonfile = { path = "../libctonfile" }

src/tools/main.rs

@@ -0,0 +1,5 @@
+
+extern crate cretonne;
+extern crate ctonfile;
+
+fn main() {}