support for "scoping" pdf2html styles
(Issue 3551) Improve cache invalidation for indirect resource references
Merge pull request #3551 from mrvisser/issue-3551

Possible JS issue in Chrome
(Issue 3551) Do not has the widget JS directories as it breaks external references
(Issue 3551) Replace references for 'custom' directory
(Release 4.3.1) Bump version
Bringing Spanish back to 100% completeness
Synched Spanish translation
Merge branch 'pdf2html' of github.com:sathomas/3akai-ux into pdf2html
Followed up on document preview scoping