explicitly add border-collapse so that it works out of the box without a css reset

[dimitropoulos]

The above screenshot shows what this project looks like "out of the box" without a CSS Reset. The example page is using a reset: _reboot.scss which is giving table border-collapse: collapse;, when (on chrome) the user agent stylesheet specifies border-collapse: separate.

By simply adding this style manually to table it makes the difference between the tool working without a css reset being required and thus makes the project more portable.