Merge branch 'morty' into krogoth

Merges the changes in the morty branch into krogoth to get Rust 1.10.0
and Rust 1.12.1 into krogoth. Additionally this allows for Rust, Cargo
and any recipes to be built without internet access if they are defined
using cargo-bitbake. Fixes #87. Fixes #122.

Jenkinsfile

@@ -8,23 +8,23 @@ for (int i = 0; i < targets.size(); i++) {
     machine_builds["$machine"] = {
         node {
             try {
-                stage('Checkout') {
+                stage("checkout $machine") {
                     checkout scm
                 }
-                stage('Setup Environment') {
+                stage("setup-env $machine") {
                     sh "./scripts/setup-env.sh"
                 }
-                stage('Yocto Fetch') {
+                stage("fetch $machine") {
                     sh "GIT_LOCAL_REF_DIR=/srv/git-cache/ ./scripts/fetch.sh krogoth"
                 }
-                stage('Build') {
+                stage("build $machine") {
                     sh "MACHINE=${machine} ./scripts/build.sh"
                 }
             } catch (e) {
                 echo "Caught: ${e}"
                 throw e
             } finally {
-                stage('Cleanup Environment') {
+                stage("cleanup $machine") {
                     sh "./scripts/cleanup-env.sh"
                     deleteDir()
                 }