Removed travis integration

.travis.yml

@@ -1,30 +0,0 @@
-language: cpp
-
-compiler:
-  - gcc
-
-addons:
-  apt:
-    sources:
-      - boost-latest
-      - ubuntu-toolchain-r-test
-    packages:
-      - libboost1.55-all-dev
-      - gcc-4.8
-      - g++-4.8
-      - gfortran-4.8
-      - liblapack-dev
-      - libgmp3-dev
-      - libsuitesparse-dev
-      - libeigen3-dev
-      - bc
-
-before_script:
-    - export CXX="g++-4.8" CC="gcc-4.8" FC="gfortran-4.8"
-    - cd ..
-    - git clone https://github.com/OPM/opm-common.git
-    - opm-common/travis/clone-opm.sh opm-core
-    - opm-common/travis/build-prereqs.sh
-    
-
-script: opm-common/travis/build-and-test.sh opm-core