upload a signed Mac app version

upload a signed Mac app version

Fix memory issue

v0.4

bump version number.

Fix the loading error when local image path has %

v0.3

Modify readme and also bump to v0.3 for releasing.

Try to fix out of memory and symbolic of file bug.

v.0.2

Fix bugs and adjust UI.

First releae

v0.1

Modify readme.