Fix master branch links

.travis.yml

@@ -14,7 +14,7 @@ install:
 - cargo install mdbook --version 0.3.7
 - cargo install mdbook-linkcheck --version 0.5.0
 script:
-- git rebase origin master # this will exit with an error on conflict
+- git log --oneline | head -n 10
 - mdbook build
 notifications:
   email:

src/SUMMARY.md

@@ -5,6 +5,7 @@
 ---
 
 - [Part 1: Building, debugging, and contributing to Rustc](./part-1-intro.md)
+    - [Prerequisites](./building/prerequisites.md)
     - [Getting Started](./getting-started.md)
     - [About the compiler team](./compiler-team.md)
     - [How to Build and Run the Compiler](./building/how-to-build-and-run.md)

src/building/prerequisites.md

@@ -0,0 +1,3 @@
+# Prerequesites
+
+** Coming Soon: https://github.com/rust-lang/rustc-dev-guide/pull/723 **

src/getting-started.md

@@ -355,7 +355,7 @@ incredibly helpful:
 - [Working groups][wg]: there are a bunch of working groups on a wide variety
   of rust-related things.
 
-[iceb]: ./ice-breaker/cleanup-crew.md
+[iceb]: ./notification-groups/cleanup-crew.md
 [wg]: https://rust-lang.github.io/compiler-team/working-groups/