SvgPointCollection ToString method fix

Fix fill-opacity/stroke-opacity wrongly inheriting from opacity when …

Fix stack overflow exception for em font-size value type

SvgPointCollection.ToString method modified to return valid coordinate string with each coordinate pair separated by whitespace and their x and y values separated by comma.

made SvgImage.GetImage public

fixed SvgImage.GetImage

[bugfix] now pattern reads proper transform named "patternTransform"

changed rounding behavior of float to int color conversion from floor() to round()

Issue 225 - Image with large embedded image fails to render

reference: https://developer.mozilla.org/en-US/docs/Web/SVG/Element/pattern

This is huge especially for the low values because human eyes distinguish darker colors much better.

- Changed SvgImage.Href property from Uri type to String to avoid UriFormatException if Uri contains too much data
- Changed GetImage to receive a string instead of Uri object.
  - Created a temp Uri object in method with substring of allowed length and using this to determine Uri characteristics

CurrentCulture Fix; SVG Viewer NullReferenceException fix; Little Maker rendering fix; Some optimization; Add "shape-rendering" support; Add "customer/ private fonts" support

Unit Test Expected Size correction with same buffer like in Unit Test
MultiThreadingTest.

Add image comparer.

# Conflicts:
#	Source/SvgDocument.cs

Documentation reference.

- change separator
- add documentation reference to separator changing
- remove and sort usings

Update to fix Draw(Height,Width) overload

As long as the functions AdjustForViewBoxWidth and
AdjustForViewBoxHeight are not fully developed pay attention that the
ViewBox width and height will not mismatch the positions of the marker
element then one of them are zero.

This changes are based on Issue #212 from mater.

Add: Quick solution to avoid  ViewBox width or height zero calculation.
Add: UnitTests

Create metafile rendering Unit Test based on Issue #210 from master.

A NullReferenceException occurred when the SVG XML will be loaded over
the textbox. The reason is that in this case the svgDoc.BaseUri is null.

This reverts commit a7097113.

This reverts commit 480a54d8.

Based on Issue #204.
Now users can add customer fonts/ private fonts to
SvgElement.PrivateFonts.

Unit Test:
Add Test: PrivateFontsTest
Add Resources from PrivateFontsTest.
Add SvgTestHelper
Change MultiThreadingTest, now based on SvgTestHelper to use shared code
(no code duplication)

Note:
MuliThreadingTest TestFile is not available. The vvvv/master should add
the test file to the resources or other developer can not test the svg
engine.

Load an attribute only once if possible.

Update to fix Draw(Height,Width) overload
#211 by OperatorOverload
Pull Request from master

Split by comma, remove space in the end
#209 by ifcwebapp
Pull Request from master