Changes since tag 2.4.0

commit 69766856d8162ee78188bce7a1d303e0f99a2255
Author: Infus <infus@squorn.de>
Date:   Tue Apr 25 21:44:28 2017 +0200

    Fix upgrade code for Icons

commit 6b6d641b69a77a1d908ebba81c70629cc7e81abf
Author: Benjamin Staneck <staneck@gmail.com>
Date:   Mon Apr 24 02:30:49 2017 +0200

    prefix a few more prints with the addon name

commit 79e666e770e7720b5259aa0e747583d3cd8f2a76
Author: Benjamin Staneck <staneck@gmail.com>
Date:   Mon Apr 24 01:51:02 2017 +0200

    avoid the table access here, trips up the locale import on WowAce

