Improve ALE project style checking

* The project style linter now runs while you type.
* Now the scripts for checking the project require blank lines.
* Many style issues have been found and fixed.

ale_linters/apiblueprint/drafter.vim

@@ -16,10 +16,12 @@ function! ale_linters#apiblueprint#drafter#HandleErrors(buffer, lines) abort
         \   'lnum': l:match[3] + 0,
         \   'col': l:match[4] + 0,
         \}
+
         if l:match[5] isnot# ''
             let l:item.end_lnum = l:match[6] + 0
             let l:item.end_col = l:match[7] + 0
         endif
+
         call add(l:output, l:item)
     endfor