Added cursor-flags initiation.

The CBM510 runs programs in a non-system memory bank. It has its own zero page. Some things are copied from the system zero page; but, the cursor flags weren't copied. So, the cursor always blinked. That bug sometimes left cursor ghosts (reversed spaces) at the end of lines.
Merge pull request #30 from greg-king5/cbm2

Added cursor-flags initiation.