Implementing the treeview element
Merge branch 'develop' of github.com:octobercms/october into develop
Refs #568 - Inherit the parent framework success function
Refs #568 - Inherit the parent framework error function
ru_lang (138)
Merge pull request #570 from Flynsarmy/popupErrors

Refs #568 - Inherit the parent framework error function
Updating dutch language files
Merge pull request #577 from stefantalen/dutch-translations

Updated dutch language files
Merge pull request #573 from mrmlnc/develop

ru_lang (138)
getClassExtension -> asExtension (shorter syntax)
Streamline partial usage in form fields and list columns
Make extend truly come last
CMS AJAX handlers now have a way to invoke the page cycle if desired
Allow complex sortable columns
Merge pull request #585 from Flynsarmy/listOrderColumn

Allow complex sortable columns
Tidy up code
Typo
Merge branch 'develop' of github.com:octobercms/october into develop
Fixes drop-down fields in dashboard widgets. Closes #588
Use translations instead of direct English word.