Fix for #101

CHANGELOG.md

build.properties.d/00_default.properties

misc/list_references_test_data.py

src/core/css/webcaosdb.css

src/core/js/ext_references.js

src/core/js/preview.js

src/core/js/webcaosdb.js

src/core/xsl/entity.xsl

src/core/xsl/filesystem.xsl

test/core/js/modules/ext_references.js.js

test/core/js/modules/webcaosdb.js.js