I started this project by myself couple of months ago.
First prototype was built in February 2016 and then I studied how USB communication between PIC and host PC works by using HIDAPI, this is awesome library released by Signal 11 software.
After the examination of hardware, I decided to change schematics to isolate signals and power between processor and measurement circuits. Now I'm making second prototype PCB.
My short-term goal is to release hardware and software until this summer. Please keep in touch on hackaday!!