Both the JEDI Code Library and the JEDI Visual Component Library completed their move from Sourceforge to GitHub. The SubVersion repositories on Sourceforge are deleted/will be deleted soon.
If you want to use the JCL and JVCL with RAD Studio XE4, you need to clone/download the JCL and JVCL from GitHub. There is no official release for XE4. Further instruction on how to get the XE4 version can be seen in the readme.md file that both projects show on their GitHub page.
JCL : https://github.com/project-jedi/jcl
JVCL: https://github.com/project-jedi/jvcl
Side note: The JVCL doesn’t contain the jvcl\common\jedi\jedi.inc file anymore because it has a dependency on the JCL and that one already has the jedi\jedi.inc file as a submodule.