add readme

Author: Remi-Gau

README.md

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+# CPP_BIDS
+
+A set of function for matlab and octave to create [BIDS-compatible](https://bids-specification.readthedocs.io/en/stable/) folder structure and filenames for the output of behavioral, EEG, fMRI, eyetracking studies.
+
+
+## Contributing
+
+Feel free to open issues to report a bug and ask for improvements.
+
+### Guidestyle
+
+-   We use camelCase.
+-   We keep the McCabe complexity as reported by the [check_my_code function](https://github.com/Remi-Gau/matlab_checkcode) below 15.
+
+
+## Functions descriptions
+
+
+### userInputs
+
+
+### createFilename
+
+
+### saveEventsFile
+
+
+### checkCFG