IS25xP driver (mostly) for Glaux

[KomaGR]

• Enhances the IS25xP device driver and adds some helper functions for easier interfacing with the device.
• Adds a main menu item and a sub-menu for the IS25xP. (And removes deprecated code from the point of initialization of the device.)
• Adds a 5ms time delay when using warpPrint. (When in Run mode the buffer could not keep up with the prints.)
• Changes Glaux default behaviour to only start streaming CSV data when WARP_BUILD_BOOT_TO_CSVSTREAM is true.
• Enables IS25xP when compiling for Glaux (config.h).
• Defines two handy macros for printing binary bytes (warp.h).

Closes #101.