Fixing RAM calculator and reduced actual SRAM usage

- Changed static variables to const that should have been const
- Updated CMake files to prepare for MCHCK custom bootloader
- Changed the USB ID numbers and ID number for bootloader
- Only generate DFU or Teensy binary image, not both
- Fixed RAM and FLASH calculator
- Added missing license in delay.c/h (much of it was taken from Teensy source though I've changed a bunch of it)
- Prepared mk20dx.c for upcoming bootloader addition
- mk20dx.h cleanup
- Reduced the MCHCK based flash size for the application image (bootloader changes requires more flash space)
- Fixed bugs in macro.c
- Added keyHold cli command
- Added show pending events debug message for PartialMap macro module

Output/pjrcUSB/arm/usb_dev.c

@@ -700,8 +700,7 @@ void usb_device_reload()
 	}
 	else
 	{
-		// This line must be exactly the same in the bootloader
-		const uint8_t sys_reset_to_loader_magic[] = "\xff\x00\x7fRESET TO LOADER\x7f\x00\xff";
+		// Copies variable into the VBAT register, must be identical to the variable in the bootloader to jump to the bootloader flash mode
 		for ( int pos = 0; pos < sizeof(sys_reset_to_loader_magic); pos++ )(&VBAT)[pos] = sys_reset_to_loader_magic[ pos ];
 		SOFTWARE_RESET();
 	}