Use Python 3 style print function in the Tutorial.

This is a step towards Python 3, we can already use
the print function under Python 2.6 and 2.7 via:

from __future__ import print_statement

TODO: Add an FAQ to the Tutorial explaining why we're
doing this.
Enable some Tutorial doctests which failed under Python 2.5 on Windows
Mention print function in NEWS for Biopython 1.63
Add Tutorial FAQ entry about print statement vs function
Include line break (layout change only)
Correct Python 2 vs 3 typo in FAQ
test_Phylo: use io.BytesIO unconditionally (Python2.6 has it)

We used BytesIO here because Py3 needs a byte stream handle to parse XML.
Use sys.stderr.write instead of print >> sys.stderr
Convert commented out print statements into print functions

This isn't really important, but it cuts down on the
false-positives when searching with grep.
Use print function style in MaxEntropy
Python 2.6+ supports sys.maxsize, Python 3 lacks sys.maxint
Use print function style in misc modules & example scripts
More function style printing
PEP8 style module docstrings
A few more print function style changes
Update www_blast.py example (works on Python 2 and 3 now)
Remove horribly out of data local BLAST example
Update make_subsmat.py example (now works on Python 2 and 3)
More PEP8 module docstring tweaking
Remove old CVS version markers