v0.4 is released

New demos

demos/draw_part_of_image.html

This file demonstrates how to use the drawFunc with an image. The image is preloaded automatically. In this demo, the part of the image is presented, and moved from left to right.

demos/draw_two_images_repeatedly.html

This file demonstrates how to present two images repeatedly until a participant responds to them. This demonstration can be applied to the study on like change blindness.

Changes

The drawFunc can be used in an image object.

Bug Fixes

The line_width property works properly. Thanks for the pull request, @kohske