Latest patch from http://www.redmine.org/issues/4905 and other changes improvements, compare also with https://orga.fachschaften.org/projects/redmine-fsenorg/repository/revisions/fsenorg/changes/extra/svn/Redmine.pm .

* Use Rails' Deprecation logger instead of the standard logger
* Update the url to a message in the forum about the change

Merge branch 'ticket/master/280-issue-autocomplete-match-issue-ids' of https://github.com/edavis10/chiliproject into edavis10_280-issue-autocomplete-match-issue-ids

Contributed by Yuki Sonoda

Using SQL CAST() to convert the issue ids to strings so LIKE will work
properly.

fixes #251