futurize --stage1
fix futurize and python file encoding
Merge pull request #4 from hayd/stage1

Future stage1 python3:

print, __code__, next, in <dictionary>, relative import fixes

Files to remember to fix for later
pattern/web/json/decoder.py
pattern/web/pdf/pdfdevice.py
pattern/web/pdf/layout.py
pattern/web/pdf/utils.py