NB2CppDemo v1.1.0

Add NB2-EEG21 (S) support, including recording to SD-card

NB2CppDemo v1.0.0

First version of NB2CppDemo support basic functionality:

• search and open NB2-EEG16 device;
• show technical information about device (serial number, prodaction date, software version and etc);
• configure device (sets data rate, adc input range, enabled channels);
• eeg asquition and peak-to-peak signal amplitude calculation;
• channels impedance registration;
• battery state registration (battery change and etc).