minor changes in minisom.py and Readme
average distance map normalized, T initialization method added
Iris example added, documentation updated
Iris example added, documentation updated
Merge branch 'master' of https://github.com/JustGlowing/minisom
Merge branch 'master' of https://github.com/JustGlowing/minisom
Merge branch 'master' of https://github.com/JustGlowing/minisom
minor changes