CI: Updates and formats configuration files.

.travis.yml

 language: node_js
-env:
-  SKIP_SASS_BINARY_DOWNLOAD_FOR_CI=true
 
-compiler:
-  - gcc
+env: SKIP_SASS_BINARY_DOWNLOAD_FOR_CI=true
+
+compiler: gcc
+
 node_js:
-  - "0.10"
-  - "0.12"
-  - iojs
+  - 0.10
+  - node  # will fetch the latest node.js version
+  - iojs  # will fetch the latest io.js version
+
 matrix:
   fast_finish: true
   allow_failures:
     - node_js: iojs
-before_install:
-  - sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test;
-  - sudo apt-get update;
-  - sudo apt-get install gcc-4.8 g++-4.8;
-  - sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.8 20;
-  - sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-4.8 20;
-  - g++ --version;
-  - sudo apt-get update -qq;
 
+before_install:
+  - sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test
+  - sudo apt-get update
+  - sudo apt-get install gcc-4.8 g++-4.8
+  - sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.8 20
+  - sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-4.8 20
+  - g++ --version
+  - sudo apt-get update -qq
   - git submodule update --init --recursive
-after_success:
-  - npm run-script coverage
+
+after_success: npm run-script coverage
+
 cache:
   directories:
     - node_modules
+
 notifications:
   webhooks:
     urls:

appveyor.yml

 version: "{build}"
 
-init:
-  - git config --global core.autocrlf input
+build: off
 
 environment:
   SKIP_SASS_BINARY_DOWNLOAD_FOR_CI: true
   matrix:
     # node.js
     - nodejs_version: 0.10
-    - nodejs_version: 0.12
+    - nodejs_version: 0    # will fetch the latest node.js version
     # io.js
-    - nodejs_version: "1.2"
+    - nodejs_version: 1    # will fetch the latest io.js version
 
 install:
   - ps: Install-Product node $env:nodejs_version
-  - cmd: SET PATH=C:\python27;%PATH%
-  - git submodule update --init --recursive
-  - ps: npm install --msvs_version=2013
   - node --version
   - npm --version
+  - git submodule update --init --recursive
+  - ps: npm install --msvs_version=2013
 
-test_script:
-  - npm test
-
-build: off
+test_script: npm test