Add `insert()` method to `Report` that add predefined lines to the created new page after footer.
Add `caption` to table column JSON.
Add methods to append empty line to `Page`.
Add new page with option to start at certain line number in `Report`.
Add `getFlatLines()` to `Report`.
Fixes inconsistent table generation bug.
Add border to table line.
Include and use DejaVuSansMono font, translates CP347 border characters into Unicode characters for preview.
Add drag feature to `PrintPreviewPane`.
Refactor domain classes by moving them to package `simple.escp.dom`.