*=$xxxx Address labelling added

Those who are really into making sprites for the C64 should love this update.

1) Load as normal (Ctrl+L)

2) Add labels with F4 (on selected sprites). the address with show on the sprites UI (tab to toggle) 3) The address and full label will show at top of the sprites panel when if selected sprite has a label. 

4) you can clear a label by making the string empty after pressing F4

5) Alt+S (not CTRL+S) to save it ready to bring into C64 Studio etc

6) Ctrl+S to save as a regular Spred File (with labels intact for Spred for future editing)

I will work on making the files opening more compatible but while in Beta there are many unpredictable changes that I make.

Please dont attempt to load a _labelled.txt file, it will crash Spred64