Upgraded to Fork CMS 3.7 & 3.8

* Modified filenames to be compatible with Fork 3.7 & 3.8
* Changed paths inside files to the new capitalized files&folders
* Removed "engine", "actions", ... folders from theme modules folder.
* Removed module templates without any additional changes/overwrites
Fix path in editortemplate
Merge pull request #1 from jessedobbelaere/upgrade-3.7

Upgrade 3.7