add block_all_childless

close #270

autoload/emmet.vim

@@ -1869,6 +1869,7 @@ let s:emmet_settings = {
 \        'inline_elements': 'a,abbr,acronym,applet,b,basefont,bdo,big,br,button,cite,code,del,dfn,em,font,i,iframe,img,input,ins,kbd,label,map,object,q,s,samp,script,small,span,strike,strong,sub,sup,textarea,tt,u,var',
 \        'empty_element_suffix': g:emmet_html5 ? '>' : ' />',
 \        'indent_blockelement': 0,
+\        'block_all_childless': 0,
 \    },
 \    'elm': {
 \        'indentation': '    ',