Do not need elements to be in a form

Since we are using a textarea now, the enter event never fires.
Apply 20px padding and proper spacing

For buttons and the for the messages area.
Merge branch 'feature/design-bottom-panel' into develop
0.1.12
Submit Sentence => Send Sentence
0.1.13
Make tooltips a bit bigger and position on top

I think this looks a little better. The tooltip appears above the word
highlighted.

It is pretty obvious (to me) that the tooltip is the definition for the
hovered word.

See #86
0.1.14
Merge pull request #114 from wlaurance/master

Align bottom panels and make tooltips bigger.