Make sure bower dependencies are installed in CI servers (#399)

Signed-off-by: Juan Cruz Viotti <jviottidc@gmail.com>

.travis.yml

@@ -19,6 +19,8 @@ before_install:
 
 install:
   - npm install
+  - npm install -g bower
+  - bower install
 
 before_script:
   - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then

appveyor.yml

@@ -24,6 +24,8 @@ install:
   - npm -g install npm@2
   - set PATH=%APPDATA%\npm;%PATH%
   - npm install --build-from-source
+  - npm install -g bower
+  - bower install
 
 build: off