pip dependencies moved to buid.py for CI

.travis/install.sh

@@ -19,6 +19,5 @@ if [[ "$(uname -s)" == 'Darwin' ]]; then
     pyenv activate conan
 fi
 
-pip install -r docs/requirements.txt
 pip install -U conan_package_tools
 conan user

build.py

@@ -11,6 +11,7 @@ if __name__ == "__main__":
         remotes = "https://api.bintray.com/conan/bincrafters/public-conan, https://api.bintray.com/conan/twonington/public-conan",
         build_policy = "outdated",
         upload_dependencies="all",
+        pip_install=["sphinx", "recommonmark", "breathe"],
 
         # build configurations
         archs = ["x86_64"], #  limit to 64-bit only