Added possibility of editing blog posts
Added render_error as method to template
Added possiblity to edit activity_log-entries
Creator, not user shows now up on activity-editing

When a user edits an activity-log entry and the user is not the creator
of this entry, he now sees the creator, not himself in the editing-view.
Added IRC-Log Viewer
Added IRC-Log link to the footer; Added section  "Services"
Added fullwidth and auto-linking for irclog
Added coloring of text-messages to IRC-Log
Merge pull request #8 from sauerbraten-fork/developing

Merge developing in master