Added error-chain to lib.rs

Cargo.toml

@@ -19,6 +19,7 @@ clap = "2.24"
 handlebars = "0.27"
 serde = "1.0"
 serde_derive = "1.0"
+error-chain = "0.10.0"
 serde_json = "1.0"
 pulldown-cmark = "0.0.14"
 log = "0.3"

src/lib.rs

@@ -69,10 +69,13 @@
 //!
 //! Make sure to take a look at it.
 
+#[macro_use]
+extern crate error_chain;
 #[macro_use]
 extern crate serde_derive;
 extern crate serde;
-#[macro_use] extern crate serde_json;
+#[macro_use] 
+extern crate serde_json;
 
 extern crate handlebars;
 extern crate pulldown_cmark;
@@ -90,3 +93,12 @@ pub mod utils;
 pub use book::MDBook;
 pub use book::BookItem;
 pub use renderer::Renderer;
+
+/// The error types used through out this crate.
+pub mod errors {
+    error_chain!{
+        foreign_links {
+            Io(::std::io::Error);
+        }
+    }
+}