Conversions: Increase font-size to 1.5em

I added style.css in the share directory of the conversions so that I can make the output prettier.
Conversions: Add design suggestions

From https://github.com/duckduckgo/zeroclickinfo-goodies/issues/460#issuecomment-45122090
Merge remote-tracking branch 'origin/master' into jag/convert-style

Conflicts:
	t/Conversions.t
Conversions: Encode HTML output.
Conversions: Add some padding around the IA.
Conversions: Numbers should have color of #393939.
Merge pull request #475 from duckduckgo/jag/convert-style

Conversions: Increase font-size to 1.5em