added support for radial gradients(only for SVGFastImageView). gradient masking now works for SVGFastImageView. added test file radialGradientTest.svg
moved file to right directory
Merge branch 'master' into 1.1.0

Conflicts:
	Demo-iOS.xcodeproj/project.pbxproj
	SVGKit-iOS.xcodeproj/project.pbxproj
	Source/DOM classes/Unported or Partial DOM/SVGGradientElement.h
	Source/DOM classes/Unported or Partial DOM/SVGGradientElement.m
	XCodeProjectData/Demo-iOS/DetailViewController.m
	XCodeProjectData/Demo-iOS/MasterViewController.m

add support for radial gradients
Merge pull request #96 from tsaizhenling/1.1.0

support for radial gradients