Enable caching; grab git-lfs.

.travis.yml

@@ -12,6 +12,12 @@ matrix:
         - CONAN_CONFIG="-s compiler=apple-clang -s compiler.version=10.0 -s compiler.libcxx=libc++"
 compiler: gcc
 language: generic
+cache:
+  directories:
+  - .conan
+
+before_install:
+- brew install git-lfs
 install:
 - git clone --depth 1 git://github.com/astropy/ci-helpers.git
 - source ci-helpers/travis/setup_conda.sh
@@ -22,10 +28,14 @@ install:
 - pip install conan
 - conan user
 - conan remote add bincrafters https://api.bintray.com/conan/bincrafters/public-conan
+
+before_script:
+- git lfs pull
 script:
 - conan install . -i build -s build_type=Release ${CONAN_CONFIG}
 - conan build . -bf build
 - mv build/FBX2glTF build/${APP_NAME}
+
 notifications:
   webhooks:
     - "https://code.facebook.com/travis/webhook/"