add missing changelogs
In portlet calendar and events, don't use the search_base directly to
  constuct calendar urls. The search base always starts from the Plone site
  root, which led to wrong urls in Lineage subsites.
pep8
- Remove the behaviors plone.app.relationfield.behavior.IRelatedItems adn
  plone.app.versioningbehavior.behaviors.IVersionable from the Dexterity
  example type. We don't depend on these packages and won't introduce an
  explicit dependency on it.
- Remove the behaviors plone.app.relationfield.behavior.IRelatedItems adn
  plone.app.versioningbehavior.behaviors.IVersionable from the Dexterity
  example type. We don't depend on these packages and won't introduce an
  explicit dependency on it.
not 4.4 but 5.0
not 4.4 but 5.0
- Restore Javascript based edit-form functionality to set end dates depending
  on start dates with the same delta of days as initialized, as developed by
  vincentfretin back at plone.app.event's birth.
Don't include the recurrence definition when doing icalendar exports of individual occurrences. Fixes: #61.
compactify docstrings
let this be more succinct, following seanupton suggestion
explicitly state relevant parameters
reformat for better readability
Don't include occurrences in icalendar exports of event_listing, but include
  the original event with it's recurrence rule. Fixes #103.
the request argument is not needed here. its only used for b_start
Fix icalendar export for collections and Archetype topics. Fixes #104.
Don't show the repeat forever button in the recurrence widget.
merge with master