Added basic webapi system to ROC CMS system.

Added sql_delete routine to replace sql_modify with "DELETE FROM .." sql statement.
Fixed filter setup when a module has more than one filter.
Fixed filter setup for site,admin and webapi modes.
Added CMS_AUTH_FILTER, and check if user is already authenticated, then skip following auth filters.
Added specific webapi handler classes for root, user, access token, ...
Added user profile system to the core module.
Moved /user/{uid} from auth module to core module.
Added possibility to add html before and after a cms form. (useful to add a form before or after, as nested form are forbidden).
Now theme can be installed using roc install command.

src/hooks/cms_hook_core_manager.e

@@ -60,6 +60,28 @@ feature -- Hook: response
 			end
 		end
 
+feature -- Hook: webapi response
+
+	subscribe_to_webapi_response_alter_hook (h: CMS_HOOK_WEBAPI_RESPONSE_ALTER)
+			-- Add `h' as subscriber of response alter hooks CMS_HOOK_WEBAPI_RESPONSE_ALTER.		
+		do
+			subscribe_to_hook (h, {CMS_HOOK_WEBAPI_RESPONSE_ALTER})
+		end
+
+	invoke_webapi_response_alter (a_response: WEBAPI_RESPONSE)
+			-- Invoke response alter hook for response `a_response'.		
+		do
+			if attached subscribers ({CMS_HOOK_WEBAPI_RESPONSE_ALTER}) as lst then
+				across
+					lst as ic
+				loop
+					if attached {CMS_HOOK_WEBAPI_RESPONSE_ALTER} ic.item as h then
+						h.webapi_response_alter (a_response)
+					end
+				end
+			end
+		end
+
 feature -- Hook: menu_system_alter
 
 	subscribe_to_menu_system_alter_hook (h: CMS_HOOK_MENU_SYSTEM_ALTER)
@@ -110,7 +132,7 @@ feature -- Hook: form_alter
 			-- Add `h' as subscriber of form alter hooks CMS_HOOK_FORM_ALTER,
 			-- and response `a_response'.
 		do
-			subscribe_to_hook (h, {CMS_HOOK_MENU_ALTER})
+			subscribe_to_hook (h, {CMS_HOOK_FORM_ALTER})
 		end
 
 	invoke_form_alter (a_form: CMS_FORM; a_form_data: detachable WSF_FORM_DATA; a_response: CMS_RESPONSE)