update mdbook to 0.1.2

and improve printing of errors

Author: steveklabnik

src/Cargo.lock

@@ -8,5 +8,5 @@ license = "MIT/Apache-2.0"
 clap = "2.25.0"
 
 [dependencies.mdbook]
-version = "0.0.28"
+version = "0.1.2"
 default-features = false

src/tools/rustbook/Cargo.toml

@@ -13,7 +13,6 @@ extern crate mdbook;
 extern crate clap;
 
 use std::env;
-use std::io::{self, Write};
 use std::path::{Path, PathBuf};
 
 use clap::{App, ArgMatches, SubCommand, AppSettings};
@@ -45,14 +44,19 @@ fn main() {
     };
 
     if let Err(e) = res {
-        writeln!(&mut io::stderr(), "An error occured:\n{}", e).ok();
+        eprintln!("Error: {}", e);
+
+        for cause in e.iter().skip(1) {
+            eprintln!("\tCaused By: {}", cause);
+        }
+
         ::std::process::exit(101);
     }
 }
 // Build command implementation
 pub fn build(args: &ArgMatches) -> Result<()> {
     let book_dir = get_book_dir(args);
-    let mut book = MDBook::new(&book_dir).read_config()?;
+    let mut book = MDBook::load(&book_dir)?;
 
     // Set this to allow us to catch bugs in advance.
     book.config.build.create_missing = false;