Bugfix ?

Shouldn't it be switch to HTML , when asp-tag + end %> ? it switches to PHP , but it's already PHP. 

compare to 
<PHP> '?>' {
      state = HTML;
      continue;
    }

where it switches to HTML in a similar condition. 

Maybe nobody tested asp-tags, seams to be broken in master.
Merge pull request #51 from ayurmedia/patch-1

Good catch.