BibDocFile: split from WebSubmit
- Separates BibDocFile source code from WebSubmit source code into dedicated module.
- Updates links and admin guide accordingly.
- Moves Document File Manager administrative interface from "/submit/managefiles" to "/CFG_SITE_RECORD/managefiles".
- Note: this commit changes most of CFG_WEBSUBMIT_* variables into CFG_BIBDOCFILE_* ones, so you may need to amend BibFormat elements and WebSubmit functions if you use them in your code.
Co-authored-by: Tibor Simko <tibor.simko@cern.ch>