BC - updates, class renaming, added `subprocess` progress ipc interaction, and better signal handling

Next version will began phasing in Linux libuv network stream/fd/socket feature, Widows support is broken will continue to use stream_select for the same feature.

• uv_run() now executing on all yield iterations
• added signal and ipc progress examples
• rework shutdown, and various bug fixes found when adding examples
• added $tasktype to addProcess method, subprocess calls need to be force run if upon entering gather method the process task not running, signal subprocess tasks handling differently
• update required, readme docs and docblock comments
• update memory handling, add close methods to Parallel, and Task, have auto destruct, check for valid instance before stopping
• spawn_kill will also cancel and remove the task