Implement Signal Quality about emokit

[heavyk]

partially implemented in 48dcbaf

the electrodes are not correctly matched with the offsets, and the code isn't optimized, but as I mention in the comments, I don't give a fuck... point is to experiment with it first... seems to be more or less giving me close readings

[qdot]

Fixed in f6382c3

[robintibor]

Hi, hope this is a good place to ask this :)
We have tried experimenting with emokit and we always just get values 0, 8, 16 and 24 for the contact quality :(
We do get reasonable (it seems) values for the sensor readings themselves... They also react to movements in predictable ways, so we are hopeful they are correct :)
Any pointers on how we can find out whats going wrong with the contact quality values?

[robintibor]

For anyone reading this, it seems the software is working just fine, we didn't place the headset correctly on the head :( We had to make sure the reference sensors are pressed more tightly against the skin, since you get low/0 values for all other sensors if reference sensors ( just below/above the ears) are not getting a good signal..
Now that we take more care of this and we get much higher values (also values above 4000, which the code mentions as good values) for the sensor quality :)

[qdot]

Gonna go ahead and mark this closed then.