Correct _KeyMaps error from V1.0.5

Affected AVR boards and flash memory accesses.

Reverted back to previous method and functions

Add Italain and Spanish Keyboards

Extend layouts for Italian and Spanish keyboards

Simplify examples and other tidy ups

Improve Library Manager support and conditionals for future platforms

Latest Arduino Library Manager support for depends and includes
Simplify examples
Change conditionals for future platform support

Improved keywords File

Minor merge but improved Keywords file