Measure accuracy

[gavinhenderson]

Is your feature request related to a problem? Please describe.
We want to know how accurate EyeCommander is at detecting user blinks

Describe the solution you'd like
Create a measure accuracy mode mode for user

• provide a mode to evaluate and send greater data back to recording system.
• In this mode user would press a key on each real blink.
• If blink detected by software user could press another key to record a inaccurate blink detected
• Software would record how many times it accurately matches this data
• maybe also send live cam stream back to a server to evaluate by Ace
• From this we could calculate an error rate - and accuracy rate - but also useful for improving.

Additional context
Make it super clear to users what data they are sending