adjusted body to json for spring and pressure bodies
added closed shape to json converter
use baseShapeConverter
added vector2 converter
implemented vecctor2 to json
added all positions of closed shape
added toJson in body for translate and scale
added pointmasses to bodyToJson
made BodyToJsonConverter static
move toJson classes to appropriate folder
moved converter to appropriate file
moved from json classes to appropriate folder
added files for conversion from json
implemented vectr2 from json
fixed naming issue
implemented shape from json
removed implementation from converter file
moved logic to world from json
added default parameter
add convenient method