changing font sizes to ems, so fonts scale a bit more gracefully (PR #3044)

as discussed here:

now if a font size is set it will scale all children relative to the parent container - so:

html {font-size: 20px} //scales all fonts

.posts {font-size: 20px} //scales only fonts within .posts


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Awesome :poodle::dash:

Does this also help with setting a base font for content, user posts?