Add reference of "PEP 0343"
Update py-cookbook of function parameter
Update py-cookbook of loop techniques
Update py-cookbook of number division
Update py-cookbook of OOP
Update py-cookbook of Context Manager
Update py-cookbook of iterator
Update py-cookbook of Generator
Add py-cookbook of Unpack From Iterables
Update py-cookbook of Queue
Update py-cookbook of Threading
Add py-cookbook of Command-Line Options
Update py-cookbook of Doctesting
[Py] support syntax doctesting
[Py] update context manager with doctesting style
[Py] update func_param with doctesting style
[Py] update oop with doctest style
[Py] minor doc-fix