Add changelog for 4.0.0 major release

Author: Damian Mooyman

changelog.md

@@ -4,6 +4,31 @@ All notable changes to this project will be documented in this file.
 
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## [4.0.0]
+
+* API Use core validation for form submission (major change)
+* Update translations
+* Add empty space before classes
+* Updated the output to provide spacing between userform-given classes
+* fixed indentation
+* When using the "are you sure?" plugin ensure the form immediately submits.
+* By default, new form fields should be shown
+* Added route for UserDefinedForm_Controller
+* Move templates to more usual location
+* API Implement option sorting
+* Make sorting of options possible
+* NEW Allow translation of tab names
+* DOCS update the docs to remove bad feature list
+* Change IFNULL to COALESE for MSSQL Compatibility
+* Change CSV field export order to match form order
+* Correcting issue #439, where date pickers were no longer functioning.
+* Add permission tests for editing fix
+* fixes late extensions binding
+* BUG fixing bug that prevents non-admin users from editing user defined form fields.
+* Implementing the "are you sure?" plugin to display a confirmation message when navigating away from a partially completed form.
+* Translation fixes
+* Add sitetree icon
+
 ## [3.1.1]
 
 * Added standard editor config