- conforms to CSS specs - use default value if value is empty
- fixes #318

* use element applies referenced viewBox scaling
* created FontManager

- prevents crash, fixes #223

- XML is case-sensitive, so some viewers / browsers choke on incorrect case
- fixes #272

- fixes W3C example painting-marker-04-f.svg

- transformations in the marker drawing element have been ignored
- fixes #215

- fixed stroke and fill color (taken from marker or from included path)
- added missing scaling for markerUnits="strokeWidth"
- fixed initial value of "orient" to be "0"
- fixes 2 of the W3C tests

- partly fixes respective W3C examples

- handle markers on paths with successive equal points
 (fixing drawing of __issue-345-01.svg)

- this kind of IDs caused a crash before
- fixes #345

- removed debug break in marker end test that made it very slow
- added link to release notes in Wiki

* Repair calculate a percentage value
* Add percentage size tests

- fixes #342

- fixes #405

- added failing test for #318

- fixes #331

- fixes #323 (caused crash)

- 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

the recently introduced optional size parameter is causing incompatibilities with our C++ application.

Unit Calculation: add spaces between operatores, remove obsolete default branch in switch statement.
bug fix #338

Fix issue with percentage unit in "stroke-width", now taken from the viewbox width/height normalised diagonale for x/y elements e.g. circle
Test images and svg under #338

- fixes #58

- could break the functionality if writing is not possible in root
- see #372

Fix Issue #385, using TextBounds.Width rather than path bounds to ensure proper font alignment for "middle" and "end" - see also "text-align-03-b"

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

- see #384

- 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