Fixes notifications for user profile comments

`$this->parameters['data']['objectID']` is the user id the profile belongs to. `ICommentUserNotificationObjectType::getOwnerID()` expects the given id to be the comment's id (cf. implementation in `UserProfileCommentUserNotificationObjectType`).

May-be the parameter name of `ICommentUserNotificationObjectType::getOwnerID()` should be changed to `commentID`.
Removes code that became obsolete with DBO::getObjectID()
Merge pull request #21 from Gravatronics/bug/wallCommentNotifications

Fixes notifications for user profile comments
Merge pull request #22 from Gravatronics/enhancement/getObjectID()

Removes code that became obsolete with DBO::getObjectID()
Added missing guest access
Merge branch 'master' of github.com:WoltLab/com.woltlab.wcf.comment
Added simple message parsing
Minor style improvements
Removed obsolete code
Major comment system overhaul

Fixes #23
Fixes #24
Fixes #25
Fixes #26
Fixes #27
Fixes #29
Fixed use-statements
Removed obsolete package id parameter
Added prototype for comment/response reports (WIP)
Merge branch 'master' of github.com:WoltLab/com.woltlab.wcf.comment
Order uses in ViewableComment und ViewableCommentResponse
Report comments/responses + performance fixes

Fixes #28
Added missing JS reference

Fixes #30
Fixed some small issues
Reflecting API changes
Fixed activity events