[#200] added the possibility to specify TMX property value to be JSON decoded
[#200] added the possibility to specify TMX property value to be JSON decoded

value must be prefixed by `json:`

melonjs/melonJS,MarkoIvanetic/melonJS,rlugojr/melonJS,srbala/melonJS,TukekeSoft/melonJS,Smoss/Enoru-eco,Smoss/Enoru-eco,TukekeSoft/melonJS,gopalindians/melonJS,gopalindians/melonJS,TukekeSoft/melonJS,gopalindians/melonJS,srbala/melonJS,rlugojr/melonJS,srbala/melonJS,rlugojr/melonJS,MarkoIvanetic/melonJS,melonjs/melonJS