Rename FastPath to PathObject

Parse SVG files

Ensure that active paths are unique

Object properties

Move drawing code to the new path class

Use other types of graphical objects

The previous version uses only simple paths this commit makes it possible to
add other objects like circles, rectangles and text. The refactoring
is the first part of the full SVG implementation.

Remove old code
Drop FastPath

Svg transform and a fix for a crash bug in ClickMap

Benchmark Stroke
Benchmark functions for the old stroke code, it took 17.6873s to create
5 strokes of the test path.