readme: Replace html/@2.png hack with SVG/Markdown badge

Like Travis and other badge services, fury.io now supports SVG
which means we can drop the <img> syntax required for resizing
a larger image.

Also moved it to outside the h1 text.

Change-Id: I39dd6076ac84d822acb386e6d46476cde24c7e0c
Merge "readme: Replace html/@2.png hack with SVG/Markdown badge"