Update README.md

Andrey1994 · web-flow · commit 6d646dfbd792 · 2021-07-12T14:42:47.000+03:00
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 BrainFlow is a library intended to obtain, parse and analyze EEG, EMG, ECG and other kinds of data from biosensors.
 
+It provides a uniform SDK to work with biosensors with primary focus on neurointerfaces, all features available for free!
+
 #### Advantages of BrainFlow:
 
 * powerful API with many features to simplify development
