Revert "All the hooks instroduced in 2.1 don't pass variables by ref any more, while hooks already present in 2.0 will still pass by-ref [Issue #54]"

This reverts commit 99797a97d2b5493a802e8dbc1b5e834bb91929ed.

Conflicts:

	Sources/Attachments.php
	index.php
	sources/Load.php
	sources/admin/ManageLanguages.php
	sources/admin/ManageSearch.php
	sources/controllers/Display.controller.php
	sources/controllers/MessageIndex.controller.php
	sources/subs/Editor.subs.php
	sources/subs/Profile.subs.php
Some other tweaks to the hooks

Signed-off-by: emanuele <emanuele45@gmail.com>
Merge branch 'master' into call_pass

Conflicts:
	sources/Subs.php
	sources/admin/ManageBans.php
	sources/admin/ManageSearch.php
	sources/controllers/Xml.controller.php
	sources/subs/Boards.subs.php
	sources/subs/Members.subs.php
Merge branch 'master' into call_pass

Conflicts:
	sources/subs/Boards.subs.php
Merge pull request #235 from emanuele45/call_pass

Call pass