Fix io.js version in Travis configuration

.travis.yml

@@ -1,7 +1,18 @@
 language: node_js
 node_js:
   - "0.12"
-  - "iojs"
+  - "iojs-v1.0.4"
+before_install:
+  # Setup sources and keys for LLVM
+  - sudo sh -c "echo 'deb http://llvm.org/apt/precise/ llvm-toolchain-precise-3.5 main' >> /etc/apt/sources.list"
+  - sudo sh -c "echo 'deb http://ppa.launchpad.net/ubuntu-toolchain-r/test/ubuntu precise main' >> /etc/apt/sources.list"
+  - wget -O - http://llvm.org/apt/llvm-snapshot.gpg.key | sudo apt-key add -
+  # Setup packages and install LLVM
+  - sudo apt-get update
+  - sudo apt-get install -y --force-yes libstdc++6
+  - sudo apt-get install -y --force-yes llvm-3.5 llvm-3.5-dev llvm-3.5-runtime libllvm3.5 clang-3.5
+  # BDW GC built dependency
+  - sudo apt-get install libc6-dev libgc-dev
 before_script:
   - "node_modules/.bin/jake ts:compile"
   - "npm run grammar"