core: set empty cookie list in dummy reqdata.
core: (transport) ensure that there is a valid session/page before handling postbacks.
core: better image quality for rendering PDFs
mod_survey: better survey results display.
core: only send a websocket ping if readyState is 1 (connected)
core: fix confusing indentation.
mod_admin_users: remove username/password buttons if not allowed to edit those.
core: Include ubf.js in blog skel.

Fixes #823
mod_survey: Align ACL check of printable results page
core: create custom pivot tables inside a transaction.
core: commit any changes from Module:manage_schema before handling the #datamodel. Not committing the the transaction locks the rsc table if a new fk constraint to the rsc table was created.
mod_editor_tinymce: initialize the tinyMCE editors lazily if they become visible.
mod_rest: prevent double quoting when importing backup files.
mod_editor_tinymce: only save tinymce editors that are actually installed.
mod_export: Forgot to pass state property
Merge branch 'master' of github.com:zotonic/zotonic
core: Added status information calls to sites manager
db: pgsql worker should fail when the linked connection dies. Fixes #821
mod_survey: added get_page/3 to fetch a specific page from a survey.
mod_survey: small html correction, added missing class 'control-label'