add readme.md

README.md

+Scripts for the analysis of FFT data
+-
+**Description of scripts**
+-
+A:  
+- run FFT on CSD-transformed resting state data
+
+B:   
+- merge individual FFT data into global structures
+
+C:
+- perform cluster-based permutation analysis
+- C2: plot results of cluster-based permutation analysis
+
+D:
+- calculate PSD slopes