Minor style refactor and add some note
Refactor some name and more notes
Dummy Command Loader now accept range
Change format for async loading on command

previously the on command autoload was

Plug 'author/some_plugin', { 'on': ['SomeCommand'] }

now is

Plug 'author/some_plugin', { 'on': [':SomeCommand'] }

In this way we free the format of plain string for the filetype
Change style from camelCase to snake_case
Add relativ rtp to plug
Change function declaration for getting relative rtp
Add load on filetype feature