Changed default import to sample-data.
Add events to table for better editability.
Mucked with key bindings for keyboard navigation.

You can now tab / shift-tab across and back a row.
Added enter key support for moving rows...

…and adding new rows.
Tabbing between rows, and shift-enter support.
Merge branch 'table-interaction'
Cosmetic tweaks

* added border-top to footer
* made initial dots have coordinates/sizes instead of 0,0,0
Disabled export button, added title text tooltips.
Merge branch 'master' into gh-pages