- set correct default for fill/stroke unset color
- fixes #398

- fixes #191

- added test image for new issue
- all passing W3C images shall now correctly be shown in passing tab

- fixes #58

- added "stroke-dashoffset" support
- added "painting-stroke-04-t" to "PassingTests" (csv/txt)
- fixes #388 

- added a few of them to passing image comparson tests

- added image broken by regression to tests (__Flag_of_the_United_States)
- added some passing issue specific tests to image comparison tests

- first try for a matching comparison test
- compares down-scaled gray-scale images pixel-wise
- see #378