History of changes

ver. 306
	Fixed bugs related to reading and erasing TDR memories.
ver. 307
	Added FLASHFRXn serial command to support alternative software.
ver. 308
	Fixed bug with DDS multiplier setting
ver. 310 
	AA-520 meter test fix
ver. 311
	Added Polish language
ver. 312
	Minor bug (related to the FLASHFRX serial command) is fixed
ver. 323
	A read memory bug is fixed for the AA-520
