Bail out before loading anything unless this flag is set.
We are doing this to guard against bundler autoloading because there is no
value in loading god in most processes.
Required files
stringio
fileutils
fastthread
thread
god/errors
god/simple_logger
god/logger
god/sugar
god/system/process
god/system/portable_poller
god/system/slash_proc_poller
god/timeline
god/configurable
god/task
god/behavior
god/behaviors/clean_pid_file
god/behaviors/clean_unix_socket
god/behaviors/notify_when_flapping
god/condition
god/conditions/process_running
god/conditions/process_exits
god/conditions/tries
god/conditions/memory_usage
god/conditions/cpu_usage
god/conditions/always
god/conditions/lambda
god/conditions/degrading_lambda
god/conditions/flapping
god/conditions/http_response_code
god/conditions/disk_usage
god/conditions/complex
god/conditions/file_mtime
god/conditions/socket_responding
god/socket
god/driver
god/metric
god/watch
god/trigger
god/event_handler
god/registry
god/process
god/cli/version
god/cli/command
god/contact