Fixed a bug in the Pick Syllable function in ASSLAnalyzeSyllables.m
Bug description: I was trying to find the nearest neighbour to a chosen
point using distances. But, the algorithm was failing as the absolute
values for the different x and y axis were orders of magnitude
different. I fixed this by normalizing the values along each axis just
for the distance calculation.

Also, changed the KlustaKwik classifier in AutoSongSegmentLabel to use
normalized feature values instead of absolute values since absolute
values for different features occupy different ranges.