cx16.vpeek() use VERA_DATA0 instead of 1, to not cause ADDRSEL to be != 0 (interferes with kernal)

compiler/res/prog8lib/cx16/syslib.p8

@@ -526,16 +526,12 @@ asmsub vpeek(ubyte bank @A, uword address @XY) -> ubyte @A {
         ; -- get a byte from VERA's video memory
         ;    note: inefficient when reading multiple sequential bytes!
         %asm {{
-                pha
-                lda  cx16.VERA_CTRL
-                ora  #1
-                sta  cx16.VERA_CTRL
-                pla
+                stz  cx16.VERA_CTRL
                 and  #1
                 sta  cx16.VERA_ADDR_H
                 sty  cx16.VERA_ADDR_M
                 stx  cx16.VERA_ADDR_L
-                lda  cx16.VERA_DATA1
+                lda  cx16.VERA_DATA0
                 rts
             }}
 }

docs/source/todo.rst

@@ -1,6 +1,7 @@
 TODO
 ====
 
+- integrate MCIOUT into diskio.f_write()
 - revisit the seek example to see if write-seeking now works?
 - remove unused interned strings in the resulting code (for example from removed if/else blocks)
 - [on branch: shortcircuit] investigate McCarthy evaluation again? this may also reduce code size perhaps for things like if a>4 or a<2 ....

examples/cx16/bobs.p8

@@ -6,6 +6,7 @@
 ; "unlimited sprites / bobs" demo effect.
 ; Note that everything is prog8, no inline assembly used/required.
 ; Note2: these aren't actual sprites, it's a bitmap backbuffer display trick.
+; TODO don't add bobs in pairs of 2 make them appear individually
 
 main {
     sub start() {