[dev] 3CXBlinkStick (USB LED notification for 3CX)

[gdesnoues]

the original post : https://www.3cx.com/community/threads/dev-3cxblinkstick-usb-led-notification-for-3cx.62626/

Hello everyone,

I am developped a dll interface between 3CX and a small USB LED card.
It's used to notify the 3CX status for all other, ideal for call center or hotline.

I use a BlinkStick square https://blinkstick.com/products/blinkstick-square
and a 3CX phone app in windows.

I have dev a dll (thanks for the suppor that helped me on some points)
It's my first dev in C# so my code may not be the best (you can help me if you want).

I have some good news for you, I took the time to fix some bugs...

## [0.8.0] - 2019-04-05
### Fixed
- wrong color after ringing during a call