Analogue-sequencer

Folks,

I've uploaded a new version of the bill of materials.
Aside from the discontinued 74HC241 at Rapid, and fixed part number 
for the PLED display module, I've also changed R25 on the main board 
from 22k to 10k.
This increases the current the transistor driving the mode LEDs can 
sink - required for blue mode LEDs. Blue LEDs tend to be rather 
bright though, so I also added a 2k2 resistor into the common 
cathode line for them. 

Cheers,
Colin f