add children information to node
Re-create generatehtml.py as node idea
Re-create template.html as node idea
fix bug
convert tab to space
Remove related js and css.
Specify encoding
Add docstring.
Fix some bugs.
Recieve also parents information, and rename key.
Rename file
Fix bug
Apply rename key in table.py to template
Divide widget-template part from html-template.
Insert blank line between widgets.
Add comment about run node.
Add comment about arguments in function 'add'.
Add more detail of comment about function 'add'.
Add configure.py
Add sample usage.