Docassemble.assemblyline

* Add "Start over" menu option
* Merge and deprecate docassemble.LanguagePack - features are now part of AL Core

Increased caching for some translated strings

* Added new short_list method on ALPeopleList, to display abbreviated list of people
* Remove some uses of question help button
* send_button_html now triggers sending separate PDFs for each bundled item. Editable checkbox still sends Word DOCX files as appropriate
* Improved bumpversion script link to changelog

* Use separate PDFs in send_button_html
* Remove some question help buttons, per usability feedback
* Fix bumpversion script

Add back in mistakenly removed AL_DEFAULT_OVERFLOW_MESSAGE

Allow ALDocumentBundles to set the value of auto_gather and gathered in object declaration