Feature-add RTL flip flop to circuit list

[Noitarud]

This one was originally innovated as a Rotary Decoder, but I noticed it could work as a Set-Reset FF, only being invalid on input signal pulse. You already have the original kind, but thought it is still worth noteing.

$ 1 5.0E-6 1.500424758475255 50 5.0 50
w 416 192 416 208 0
w 384 208 416 208 0
w 416 256 416 272 0
L 384 208 256 208 0 1 true 5.0 0.0
L 384 256 256 256 0 1 true 5.0 0.0
r 352 192 352 128 0 1000.0
x 187 240 245 246 0 24 H=on
w 416 336 416 304 0
r 352 336 416 336 0 1000.0
w 384 256 416 256 0
r 352 272 352 336 0 1000.0
w 384 288 320 288 0
w 384 176 320 176 0
w 416 160 416 128 0
r 416 128 352 128 0 1000.0
g 352 336 320 336 0
g 352 128 320 128 0
t 384 288 416 288 0 -1 0.0 0.0 100.0
t 352 272 384 272 0 -1 0.0 0.0 100.0
t 384 176 416 176 1 -1 0.0 0.0 100.0
t 352 192 384 192 1 -1 0.0 0.0 100.0
w 320 288 352 192 0
w 352 272 320 176 0
M 416 336 464 336 0 2.5
M 416 128 464 128 0 2.5