Rainlendar 2.11 Beta 124

# Changes:
* New completely rewritten manager dialog.
* Fonts in skins didn't work on Windows.
* The skin comment can contain newlines ("\n")
* Added the name of the translator to the about dialog.
* The submenus can be again wrapped inside a table for Rainlendar_ShowMenu() so that their position can be defined.
* Fixed division by zero error if the all day event area height was set to 0.
* Removed hard dependency to the appindicator library on Linux.
* Re-enabled the description field for Remember the Milk tasks.