callback_event() with other data types than strings

[GoogleCodeExporter]

Which would allow much more possibilities than now.

Todo;

* Base combining and returned value to the current and existing handlers' 
returned values.
* This allows support to arrays and single callback handlers. If there is only 
one handler it would return the original value (e.g. boolean) and with arrays 
merge values into a one big array.
* All current uses would stay same.

The real difference would be defining '$return_value' on the first handler 
instead of as an empty string.

Original issue reported on code.google.com by jukka.m.svahn on 16 Feb 2013 at 11:09

[GoogleCodeExporter]

This issue was closed by revision r5229.

Original comment by jukka.m.svahn on 16 Feb 2013 at 11:16

• Changed state: Fixed