ct: Open errors in browser on fail. Makefile cleanup.
Clean up compiler header.
Update README to reflect changes in upcoming commits.
HTML and JS escaping, cleanup, clearer test output

* `autocomplete' tag.
* `safe', `escape', `escapejs' filters.
* `autocomplete' in context recognized (boolean).
* Improved test output (fixes issue where line numbers reported were
  incorrect).
* New Filter API: Filters must return `{ok, Bin}' rather than `Bin'.