* Updated MCP23017 Component To Cover 8 & 16 Port Chips
* Made requested changes, adding short paragraph at top of MCP230xx.rst
explaining the page is for MCP23008 and MCP23017, also deleted now
obsolete MCP23017.rst
* Added separate sections for MCP23017, MCP23008
* Remove MCP23017 page (merged with new one)
Co-authored-by: Otto Winter <otto@otto-winter.com>
