Documentation page about Composer usage in eZ Publish for :
Doc: EZPESU-2014-013-KERNEL5.2 security update needs better doc
Doc: Composer installation in specific 5.x branches
Current state of Composer doc: https://doc.ez.no/display/EZP/Using+Composer
New page for sysadmin : https://doc.ez.no/display/EZP/Composer+for+System+Administrators
New page for frontend dev : https://doc.ez.no/display/EZP/Composer+for+Frontend+Developers
Why are we documenting global use of Composer?
As stated in EZP-23342 issue local use is more common and is what we have already documented.
IMHO more then enough if we mention this on our main composer (Using Composer) page and link to composer doc for how to install globally, then we don't need to deal with all the permission stuff.
Reviewed and approved by Q.A.