- if the element would have another inherited stroke value,
  the "none" value was not written anyway
- fixes writing of painting-marker-01-f.svg and painting-marker-06-f.svg

- fixes #399

- adapted test to check for default value
- see #399

- added (base) test cases for the lexer issues and 2 test files. The d="" luckily seems to 
  behave as expected (did crash in earlier versions)
- found the exact line in the CSS that failed (border with !important) and isolated the test
- updated names of the tests and files
- added a reference test for the non important line (which should always work).
- fixed small spelling error in the css parser.
- added trailing whitespace test for #399, which also crashes the lexer 

- added basic support for "medium", "small" etc. font-size values
- fixes #419

- commented out 2 failing tests

- if the alpha value is less than 1, write additionally the opacity
- fixes #129 (issue 4)

- fixes styles written as invalid properties
- fixes part of #129 (issues 2 an 3), added test images

- added possibility for class-specific default attribute values
- fixes load/save of W3C example pservers-grad-06-b
- fixes #397

- 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