Fix lefthand side spacing

This is a very small update that wraps the main html content, via the base template, in a `<div class="small-12 large-12 columns">` tag, increasing the spacing on the lefthand side to be more aesthetically pleasing (along with defining the grid structure for this row). This class definition within the above `<div>` tag is a common part of the row/column definition used by the foundation web framework. I tested this using the method previously suggested so it is ready for review.