Changed some values to be explicitly boolean
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* Script to collect port polling data and compare full walk vs selective port polling.
* Select hosts. Colors. Percent. Units (s). Enable sel poll.
* Moved the colors. Disable selective if needed. Report set status and count.
* Style fix.
* CLI help.
* Docs.
* Style fix.
* Allow comma separated device_id list.
Better color formatting for output
Fix issue when using &$device by reference
* feature: Added ability to switch port polling mode
* update, speed things up slightly by walking certain tables
* more fixes
* updates
* updates
* update to exclude ports that are down
* wrong variable used
* update to set previous port status when null
* small update to port disco
Clarified that the mysqld performance options need to be put under a [mysqld] group in my.cnf. Since in Ubuntu 16.04 /etc/mysql/my.cnf only has [client-server] group by default which is not a valid group for the changes we make.
