Fix when fill="none"

This fix the wrong fill when fill="none". The original version fill it in black.

Fixes simultaneously rendering multiple images

Added support for multiple font-family strings

Revert "Embedded transformations"

Added support for multiple comma separated font lists, CSS style.

Get first font in font family only.

This reverts commit 8c10c2e6.

Write fill attribute value if it differs from parent element, as a temporal fix.

Support "none" in Fill value if inherited from parent

If elements are nested in groups and have different fill values than
their containing group the fill value wouldn't be written correctly.

added nuget information