Update beeswarm initial view

Creates checkboxes that allow user to symbolize by evidence value, level of agreement, and direction. Beeswarm loads as equally sized bubbles sorted by dimension. This version removes the toggle switch from previous versions that switched back and forth from determinant and indicator level. This version only uses determinant level data.

• Toggling Evidence resizes the bubbles by evidence value. You can toggle Evidence off and the bubbles return to their initial size, but retain the spacing between bubbles created when the bubbles were sized by evidence. (Not on purpose, I just didn't get to that)
• Toggling Agreement orders the bubbles along the x axis depending on their level of agreement. Toggling Agreement off doesn't do anything yet. Also need to plan to toggle the x axis off when Agreement is toggled off.
• Toggling Direction orders the bubbles along the y axis according to their direction of agreement. Toggling Direction off just runs it again and keeps spreading out the bubbles along the y axis (Again, not on purpose). Need to add labels back in for the directions.

On load:

Evidence alone:

Agreement alone:

Direction alone:

All three toggled on:

Closes #13 (closed)