Merge pull request SVGKit#597 from dreampiggy/project_release_2.1.0

WIP:Upgrade the framework version to 2.1.0

Updated library version + filename to 2.0.0

Version 1.2.0

Tagging 1.1.0 for CocoaPods

Declaring arbitrary version 1.0 (we need to start versioning properly…

…, and this point represents a stable and decent quality implementation. Note: we have not covered 100% the SVG spec yet, but that will take a long time yet