Fancy start tile on Windows (10 + possibly 8.1, would be nice to check).

[bsclifton]

• Submitted a ticket for my issue if one did not already exist.
• Used Github auto-closing keywords in the commit message.
• Ran git rebase -i to squash commits if needed.

Changes only affect Windows build / install / update.
Fixes #2372

[bsclifton]

I tested fairly well locally... but I can't build the installer unfortunately due to not understanding how to handle the Authenticode certificate / password part.

The images (70x70 and 150x150) can be replaced at any time- most of the work in this PR is copying them from the ./res folder into the build folder. The install/update process (squirrel) will then copy the manifest file (which should be at the project root) into the parent folder (where Update.exe lives; which is important because this is what is linked to w/ the shortcut)

If folks already have this pinned to their start, they'll need to unpin/pin again for the new manifest to be cached by Windows

[bbondy]

lgtm we'll test soon with a beta build. I'll merge for now.