Switch to sdk/ui/button instead of sdk/widget
Merge pull request #503 from mozilla/australis

Switch to sdk/ui/button from sdk/widget, fixes issue #494
Do the upload in the parent addon script rather than from content
add hooks for info pages after install and upgrade

pages are just stubs for now
fix broken link to addon sdk installation info
Recommend using development version of addon sdk
Explicitly detect Australis
First run page chosen based on FF version
Remove extraneous header, point to metrics endpoint
draft first run page
Merge pull request #511 from mozilla/fubar

Do the upload in the parent addon script rather than from content
stylish list numbers
light blue background
move styles to external file
Reuse OpenSans.css for first run page
balance list number's font size
blank target on first run page's links

This makes the links open in a new tab. I think this is helpful for people who
might click a link, and then not know how to get back to the first run page.
pad the bottom of the page for balance
specific wording for contact methods
copy first run page and tweak for australis