add authorizer

CMakeLists.txt

CMakeModules/prepare_asapo.cmake

authorizer/CMakeLists.txt

authorizer/src/asapo_authorizer/main/authorizer.go

authorizer/src/asapo_authorizer/server/authorize.go

authorizer/src/asapo_authorizer/server/authorize_test.go

authorizer/src/asapo_authorizer/server/get_health.go

authorizer/src/asapo_authorizer/server/get_health_test.go

authorizer/src/asapo_authorizer/server/listroutes.go

authorizer/src/asapo_authorizer/server/server.go

authorizer/src/asapo_authorizer/server/server_nottested.go

config/nomad/authorizer.nmd.in

config/nomad/nginx.nmd.in

tests/automatic/settings/authorizer_settings.json.tpl

tests/automatic/settings/nginx.conf.tpl