add prefix and suffix option to NumberProperty, extend floating point/(un)signed editors #69
fix compilation on Linux/gcc
revert changes in NumberProperty::toString
handle prefix and suffix in PropertyPainter, add float suffix example in propertyguizeug
revert changes in integral editors and spin boxes
move code into conditional block
Merge pull request #80 from kateyy/numberProperty_prefix_suffix

add prefix and suffix option to NumberProperty ref #69