add python3 in sample Makefile
clean up HTMLConverter and XMLConverter encoding
fix dict_value usage in strict mode
keep password api unicode, latin1 or utf-8 is encoded in handler
password py3
apply_png_predictor py3
guess argv encoding in py2 using sys.stdin.encoding
more xrange to range
Merge pull request #3 from Cybjit/master

Samples and latin1 passwords