Limit keymap to html/php/twig file.

Only for html/php/twig file.
Remove useless sub-menu in edit menu

Before : EDIT > Beautify HTML > Beautify HTML
After (now) : EDIT > Beautify HTML

(I beaufity js)
Remove "shift" key_binding like JS beautify

CTRL + ALT + F
Update README to last commit
Merge pull request #12 from GuimDev/master

Update menu and key binding and limit to html/php/twig file.