1.6.6.1 released

Use MDIUtilities 1.2.63
Add the path of the original article for the error for articles which have the same name as another article
Enclose article names inside quotes in errors
Fix some cases where Java API members links were not correctly validated and were incorrectly seen as invalid
Support various additional special arrow characters
Fix some cases where a resource in the doc-files directory would not be found
Fix the output of special characters in pre elements
Decrease the http timeout from 500 ms to 300 ms