* Fixed an issue that nothing is captured when selecting exactly a single node.
* Fixed an issue that nodes outside the html node are not captured.
* Improved capture selection to support more special cases, such as a selection outside of the body node.
* No more generate linefeeds for the capture/save content by default, with a new option `capture.preffyPrint` to tweak the behavior.
* Added `attach link` to the editor tools.