v0.2.0

Features:

• Project's Path is allowed to edit #28
• Check for the project with empty image's folder #28
• Save step and step when you quit the project? #27
• Showing file path in annotation #26
• Optimize edgeAbsorption of PolygonTool which can absorpts points #15

Fix

• Fix the problem that the edge of rectTool cannot be dragged #22
• Updatefile_name from absolute path to file name in coco data #19
• In the text annotation, the content in the text area won't change when I jump to other images. #17
• The point still follows the mouse when mouse is released
• The distance between limit points can't be less than 0.2px