update unit tests
Python 3 support: use next() instead of .next() + define xrange()
pattern.db date() can take "week" keyword argument.
pattern.text improved keywords() and tokenize(), deal with emojis
pattern.fr small sentiment() fix
pattern.nl + pattern.en added some smileys and slang words to tagger
pattern.server various fixes + SSL support
canvas.js more flexible Array extensions + Path.arc()