Add title elements describing the svg for accessibility purposes.
This is of limited use because the svg will be brought into an html
document via the img element, but it could be useful if a visually
impaired user accesses the svg directly. The title on each badge
is just a statement of the badge name. While sparse, it's helpful
because while the text elements of each badge contain this info,
it's duplicated and split up and would not be easy to understand.
Change-Id: Ia0a9b09221cf6bce029d1a5cee523efef201cf54
14e928bbf8