Fix download in travis config

.travis.yml

@@ -7,7 +7,8 @@ php:
 before_install:
   - sudo apt-get update
 install:
-  - sudo apt-get install xvfb curl
-  - sudo curl -O 'http://skylink.dl.sourceforge.net/project/wkhtmltopdf/0.12.1/wkhtmltox-0.12.1_linux-precise-amd64.deb'
+  - sudo apt-get install xvfb curl wget
+  - echo 'content-disposition = on' >> /etc/wgetrc
+  - sudo wget 'http://downloads.sourceforge.net/project/wkhtmltopdf/archive/0.12.1/wkhtmltox-0.12.1_linux-precise-amd64.deb?r=http%3A%2F%2Fsourceforge.net%2Fprojects%2Fwkhtmltopdf%2Ffiles%2Farchive%2F0.12.1%2Fwkhtmltox-0.12.1_linux-precise-amd64.deb%2Fdownload%3Fuse_mirror%3Dnetcologne&ts=1422007350&use_mirror=hivelocity'
   - sudo dpkg -i ./wkhtmltox-0.12.1_linux-precise-amd64.deb
   - composer install