Update travis file to use conan environment

Author: winterheart

.travis.yml

@@ -1,41 +1,56 @@
-language: c
+language: python
+python: "3.7"
 
 notifications:
   email: false
 
 env:
   - PACKAGE_NAME="shockolate-$TRAVIS_OS_NAME.tgz"
 
+addons:
+  apt:
+    packages:
+      - libx32gcc-5-dev libc6-dev-i386 gcc-multilib g++-multilib libglu1-mesa-dev:i386 libgl1-mesa-dev:i386
+      # For conan's sdl2-mixer
+      - libasound2-dev:i386 libpulse-dev:i386 libglib2.0-dev:i386
+
+install:
+  - pip install --upgrade pip
+  - pip install conan
+  - conan user
+  - conan remote add bincrafters https://api.bintray.com/conan/bincrafters/public-conan
+
 matrix:
   include:
     - os: linux
-      dist: trusty
+      dist: xenial
       sudo: required
       env:
         - SDL2_LIB=BUNDLED
         - SDL2_MIXER_LIB=BUNDLED
         - FLUIDSYNTH_LIB=BUNDLED
-      addons:
-        apt:
-          packages:
-            - cmake-data cmake libx32gcc-4.8-dev libc6-dev-i386 gcc-multilib g++-multilib libglu1-mesa-dev:i386 libgl1-mesa-dev:i386
       compiler: gcc
     - os: osx
+      osx_image: xcode9.4
+      language: shell
       compiler: clang
       env:
         - SDL2_LIB=BUNDLED
         - SDL2_MIXER_LIB=BUNDLED
         - FLUIDSYNTH_LIB=OFF # Bundled lib failed to compile
     - os: osx
+      osx_image: xcode9.4
+      language: shell
       compiler: gcc
       env:
         - SDL2_LIB=BUNDLED
         - SDL2_MIXER_LIB=BUNDLED
         - FLUIDSYNTH_LIB=OFF # Bundled lib failed to compile
 
 script:
-  - sudo TRAVIS=$TRAVIS ./osx-linux/install_32bit_sdl.sh
-  - cmake -DCMAKE_LIBRARY_PATH=/usr/lib/i386-linux-gnu -DENABLE_SDL2=${SDL2_LIB} -DENABLE_SOUND=${SDL2_MIXER_LIB} -DENABLE_FLUIDSYNTH=${FLUIDSYNTH_LIB} .
+  - mkdir build && cd build
+  - conan install .. --settings arch=x86 --build=missing
+  - cmake .. -DCMAKE_LIBRARY_PATH=/usr/lib/i386-linux-gnu -DENABLE_SDL2=${SDL2_LIB} -DENABLE_SOUND=${SDL2_MIXER_LIB} -DENABLE_FLUIDSYNTH=${FLUIDSYNTH_LIB}
   - make -j2 systemshock
 
 before_deploy: