improve document for looking comfortable
modify dir and variable name
add a Hello World to document
add some descriptions of module , configuration, command-line to document
improve structure of document
alter the "hello world" demonstation
adjust the structure of loading file
add only_enable_module option to scfg file
alter the output sentence
inject a ignored block for initializing Stool module
detail the description of various of base module that considers use, like data, view
update the file name of module info stored, add the initialization options