fixed method name.

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>
add screenshot

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>
add screenshot on readme.

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>
Merge pull request #4 from appleboy/upgrade_base_model

Upgrade base model