Upgrade to wrapper version 3.5.26 

Upgrade to wrapper version 3.5.26 : http://wrapper.tanukisoftware.com/doc/english/release-notes.html

Related to https://github.com/eXist-db/exist/issues/429 and  https://github.com/eXist-db/exist/pull/286 

Thanks to @simonkrenger  for the 64bit windows wrapper.