allow images to be in nodes about jsmind

[hizzgdev]

Yes, images can be added to a mindmap in jsmind in 2 ways:

1. [recommended] add as a background. The feature is documented at operation-setting-style , and there is a demo of it: all features - [click “open example” button on the left-top of the page]

2. add as html-tag, by default jsmind allows you put html into node.topic, so it will be the last workaround you can take. The option about html supports is described in options