add a note about read_from_memory
move HNZVC info from instruction to op code
manual changes for "reads from memory" info
remove "addr mode" register and stack
rename "operand" to "register"
add "needs_ea"
needs_ea for all branch instructions
* "needs_ea" is not the same for all ops

* CLR, ST* needs ea
ea is needed if write to memory
bugfix TFR, JSR data
updates for new 6809 data