Removed debug print
* README.md:
  Added TODO to the README

* inc/htmlwriter.lua, lua/ar_defaulterrors.lua,
  sites/buildserver/lua/ar_buildserver.lua,
  sites/buildserver/lua/template_buildserver.lua:
  HTML generator now, by default, escapes content (can be overloaded
  for specific tags in rare cases such as `<script>` follows differnt
  escaping rules.
Added tags.NOESCAPE to mark the next none-tag value to not be escaped