chore(ci): use github actions instead of travis

.github/workflows/build.yml

+name: Build
+
+on: [push]
+
+jobs:
+
+  LinuxCuda8:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v1
+    - name: CMake
+      run: docker build . --file docker/ci.dockerfile --tag stitchem-cuda8:latest --build-arg version=8
+    - name: Build
+      run: docker run stitchem-cuda8:latest
+
+  LinuxCuda9:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v1
+    - name: CMake
+      run: docker build . --file docker/ci.dockerfile --tag stitchem-cuda9:latest --build-arg version=9
+    - name: Build
+      run: docker run stitchem-cuda9:latest
+
+  LinuxCuda10:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v1
+    - name: CMake
+      run: docker build . --file docker/ci.dockerfile --tag stitchem-cuda10:latest --build-arg version=10
+    - name: Build
+      run: docker run stitchem-cuda10:latest
+
+  MacOpenCL:
+    runs-on: macos-latest
+    steps:
+    - uses: actions/checkout@v1
+    - name: Deps
+      run: brew install bison ceres-solver CMake doxygen faac faad2 ffmpeg glew glfw glm jpeg libpng libtiff ninja opencv@3 qt yasm
+    - name: CMake
+      run: mkdir build && cd build && PATH="/usr/local/opt/bison/bin:${PATH}" cmake -DCREATE_BOX_PACKAGE=OFF -DGPU_BACKEND_CUDA=OFF -DGPU_BACKEND_OPENCL=ON -DMACPORTS=OFF -DQt5_DIR=/usr/local/opt/qt/lib/cmake/Qt5 -G Ninja ..
+    - name: Build
+      run: cd build && ninja
+
+  WindowsCuda:
+    runs-on: windows-latest
+    steps:
+      - uses: actions/checkout@v1

.travis.yml

-language: cpp
-cache: ccache
-
-matrix:
-  include:
-    - name: OpenCL macOS
-      os: osx
-      addons:
-        homebrew:
-          update: true
-          packages:
-            - bison
-            - ccache
-            - ceres-solver
-            - CMake
-            - doxygen
-            - faac
-            - faad2
-            - ffmpeg
-            - glew
-            - glfw
-            - glm
-            - jpeg
-            - libpng
-            - libtiff
-            - ninja
-            - opencv@3
-            - qt
-            - yasm
-      before_install:
-        - export PATH="/usr/local/opt/bison/bin:/usr/local/opt/ccache/libexec:${PATH}"
-      script:
-        - mkdir build
-        - cd build
-        - cmake -DCREATE_BOX_PACKAGE=OFF -DGPU_BACKEND_CUDA=OFF -DGPU_BACKEND_OPENCL=ON -DMACPORTS=OFF -DQt5_DIR=/usr/local/opt/qt/lib/cmake/Qt5 -G Ninja ..
-        - ninja
-    - name: CUDA 8 Linux
-      dist: xenial
-      services:
-        - docker
-      before_script:
-        - docker build --tag stitchem-cuda8:latest --file docker/ci.dockerfile --build-arg version=8 .
-        - docker create -v ${HOME}/.ccache:/ccache --name ccache stitchem-cuda8:latest
-      script:
-        - docker run --env CCACHE_DIR=/ccache --volumes-from ccache stitchem-cuda8:latest
-    - name: CUDA 9 Linux
-      dist: xenial
-      services:
-        - docker
-      before_script:
-        - docker build --tag stitchem-cuda9:latest --file docker/ci.dockerfile --build-arg version=9 .
-        - docker create -v ${HOME}/.ccache:/ccache --name ccache stitchem-cuda9:latest
-      script:
-        - docker run --env CCACHE_DIR=/ccache --volumes-from ccache stitchem-cuda9:latest
-    - name: CUDA 10 Linux
-      dist: xenial
-      services:
-        - docker
-      before_script:
-        - docker build --tag stitchem-cuda10:latest --file docker/ci.dockerfile --build-arg version=10 .
-        - docker create -v ${HOME}/.ccache:/ccache --name ccache stitchem-cuda10:latest
-      script:
-        - docker run --env CCACHE_DIR=/ccache --volumes-from ccache stitchem-cuda10:latest

CMakeLists.txt

@@ -126,6 +126,10 @@ endif()
 # Use definitions from the cmake folder for find_package
 # ----------------------------------------------------------------------------
 list(APPEND CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake")
+if(APPLE)
+  list(APPEND CMAKE_PREFIX_PATH /usr/local/opt/opencv@3/share/OpenCV)
+  include_directories("/usr/local/include")
+endif()
 
 
 # ----------------------------------------------------------------------------

README.md

 [license-badge]: https://img.shields.io/badge/license-MIT-green.svg
 [license-link]: https://opensource.org/licenses/MIT
 
-[travis-badge]: https://img.shields.io/travis/stitchEm/stitchEm/master.svg?label=Build
-[travis-link]: https://travis-ci.org/stitchEm/stitchEm
+[actions-badge]: https://github.com/stitchEm/stitchEm/workflows/Build/badge.svg
+[actions-link]: https://github.com/stitchEm/stitchEm/actions
 
 [![License][license-badge]][license-link]
-[![Build][travis-badge]][travis-link]
+[![Build][actions-badge]][actions-link]
 
 Vahana VR & VideoStitch Studio: software to create immersive 360° VR video, live and in post-production.