Simple AudioRecorder
Add FFT class
Add Window class with hamming window
Add hann window
Add voice handler interface
Add methods to normalize and divide audiobuffer
Add javadoc to FFT and Window classes
Add Mel class and change division into frames
Add filter bank and mel-keps transformation
-read wav file 
-make short massive from wav file
Change structure
add getter shortArray
Add LineGraph
Merge with operation
Add preprocessing