Alpha_1.0.0

- fixed ENOENT file not found external storage issue: the path DOESN'T
START AT /Android/, but
Environment.getExternalStorageDirectory().toString()/Android
- introduced threads to speed up app and make Android happy

Please read the doc at the top of PeaksActivity.java!
- generates a terrain file of 1s and 0s in folder, specified in
PeaksDetect documentation
- made the UI "nicer" by adding a button to start the processing