Version 1.20

- Detect absolute filespecs and handle them like the build-in file completion, as the default mapping overrides that. If the user wants to convert the filespec into a link, she must do this explicitly via the html_PathConvert.vim plugin.
- Add dependency to ingo-library (vimscript #4433). *** You need to separately install ingo-library (vimscript #4433) version 1.019 (or higher)! ***