Removed 'partner' repository.

Signed-off-by: Lukasz Gromanowski <lgromanowski@gmail.com>

.travis.yml

@@ -7,7 +7,7 @@ before_script:
  - cmake .. -DOGRE_STATIC=1 -DMYGUI_STATIC=1
 before_install:
  - git submodule update --init --recursive
- - echo "yes" | sudo add-apt-repository "deb http://archive.ubuntu.com/ubuntu `lsb_release -sc` main universe restricted multiverse partner"
+ - echo "yes" | sudo add-apt-repository "deb http://archive.ubuntu.com/ubuntu `lsb_release -sc` main universe restricted multiverse"
  - echo "yes" | sudo apt-add-repository ppa:openmw/deps
  - sudo apt-get update -qq
  - sudo apt-get install -qq libboost-all-dev libgtest-dev google-mock libzzip-dev