capistrano v3 task run flow

cap3-run-flow.txt

rake deploy
======

starting
started
  deploy:check
    deploy:git:check
    deploy:check:directories
    deploy:check:linked_dirs
    deploy:check:linked_files
update
  git:create_release
  deploy:symlink:shared
    deploy:symlink:linked_files
    deploy:symlink:linked_dirs
  _after:
    deploy:bundle
finalize
  _before:
    deploy:migrate
  deploy:symlink:release
  _after:
    deploy:normalise_assets (TODO: remove)
restart
finishing
finished
  deploy:log_revision