Add ability to add/remove data
- Merge pull request #17 from githubocto/aw/edit-add-data 21c26d8
- feat: focus first cell on column add 11ee519
- feat: add ability to add & delete column/rows 2249cc6
- feat: show blank cells as blank instead of "-" 75ac3ce
- fix: make hovered cells overlay others 06b8f8c
- fix: override css cascade bugs f4a5e07