- add randomhost\Image\Text\Text interface
- add randomhost\Image\Text\Generic class as replacement for previous randomhost\Image\ImageText
- add randomhost\Image\Text\Decorator\Generic
- add randomhost\Image\Text\Decorator\Border
- add randomhost\Image\Color
- add randomhost\Image\Image::mergeAlpha() for merging images with modified alpha value
- remove text related functionality from randomhost\Image\Image