added draft for events
added ISvgEventCaller to register the event actions and implemented Click and MouseMove events
added extention methods
implemented basic mouse events for testing purposes
removed Children override as temp fix
added 'xlink:' to href attribute of 'use' element
removed debug
fixed typo
fixed circle attributes
added click count to click method and mousearg
fixed signature
now also parses custom attributes
document can load subclasses of SvgDocument, fill inheritance working
improved event publishing
added missing raise event methods
added more events and fixed IdManager bug
work on update events
visibility naming fix
Revert "Embedded transformations"

This reverts commit 8c10c2e6070c4cadf391808fe9a679bed95e4249.
fixes System.InvalidOperationException when simultaneously rendering multiple images