Draggable: Account for z-index set in CSS for the stack option.  Fixed #9077 - Draggable: stack option resets the z-index
Position: Handle decimal percentage offsets. Fixes #9076: percentage offset does not support decimal
Datepicker i18n: Change Slovak day/month names to lowercase. Fixes #9078 - Datepicker Slovak localisation - name of day/month is always lowercase.
Removing unnecessary wrapping of this in draggable's stack option handling.
Merge branch 'draggable_fix_9077'
Theme: Collapse border in .ui-helper-cleafix. Fixes #8442 - CSS: ui-helper-clearfix bug within table with border spacing.
Updated AUTHORS.txt.
Grunt: update generate_themes task to use the new DownloadBuilder API

- DownloadBuilder accepts the config file as an option. It's not necessary
  to workaround it by changing the DownloadBuilder config file anymore;
- DownloadBuilder has exposed a method to generate the theme gallery bundle;
Build: Cleanup.
Build: Use fs.existsSync() instead of path.existsSync().
Updating the master version to 1.10.2pre.
Sortable: Inject a CSS rule to style the cursor. Fixed #7389 - sortable: 'cursor' option didn't override CSS cursor settings.
Dialog: Don't hard-code widget data key. Fixes #9097 - UI dialog inheritance.
Datepicker: Updated German locale. Fixes #9098 - Datepicker German localization - make casing of previous/next/today consistent.