Change xml format and list format.
Modified doctest.
infomanager.py is splited between the funcftion 'humanReadable' and others.
details of read and save xml files in infomanage.py are moved to etreeio.py.
Refactoring.
Rename some function and Update doctest.
Rename to lowercase with underscore.
Pipe must return node_list about issue #5
Implement node_list to/from JSON interface
Implement register function
Remove same functional pipe as jsonio.py
Fix small bug
Add file check
split line for limitation of line length.
Rename function and add docstring.
Make default value of the flag "ask_replace" True

And add short docstring.
Specify encoding
Merge pull request #11 from marubu/encoding

Specify encoding and unify the coding rule.
Merge pull request #6 from termoshtt/json_io

Node list saver/loader
Refine path expansion.