doc, installer: win - new logo in installer

[eljefedelrodeodeljefe]

Description of change

Latest logo iteration makes image adaptation necessary, #5381.
I couldn't get wix or VS to run properly (new to windows dev), but according to what I see in the installer and read in the wix project, this should suffice.

Pull Request check-list

Please make sure to review and check all of these items:

• Does make -j8 test (UNIX) or vcbuild test nosign (Windows) pass with
  this change (including linting)?
• Is the commit message formatted according to CONTRIBUTING.md?
• If this change fixes a bug (or a performance problem), is a regression
  test (or a benchmark) included?
• Is a documentation update included (if this change modifies
  existing APIs, or introduces new ones)?

NOTE: these things are not required to open a PR and can be done afterwards /
while the PR is open.

Affected core subsystem(s)

none

[Fishrock123]

Could these be .png? I think there was maybe a windows issue about that?

@eljefedelrodeodeljefe Could you ensure that these are run though tools like imageoptim to reduce their size as much as possible (while keeping quality)?

[mikeal]

I've got several high res versions of the logo, we're working to get the downloads page on the website updated with them. You'll see them posted here soon nodejs/nodejs.org#526 (comment)

[eljefedelrodeodeljefe]

@Fishrock123 can do it in .png, would be a change from .jpg though. I ran it from Adobe Illustrator / Photoshop. But will try to optimise further with something like it.

@mikeal took the vector formats out of the .pdfhttps://drive.google.com/folderview?id=0B2SAGsHi4DjIcHB0cTZZcXFZNG8&usp=sharing

[eljefedelrodeodeljefe]

saved 20% space, output looks good to me still.

[rvagg]

I'm pretty sure we've had problems with trying to do .png in the past, I'll push out a test build as soon as we have Jenkins back

/cc @nodejs/platform-windows

[joaocgreis]

.png is a problem for Windows 7 / 2008, according to MSDN it is only supported on Windows 8 and after. I confirmed it, the installer appears with a gray background.

@eljefedelrodeodeljefe the last post on http://windows-installer-xml-wix-toolset.687559.n2.nabble.com/BMP-and-JPEG-td3503935.html suggests compressed indexed .bmp, you could give it a try, or just use .jpg.

[eljefedelrodeodeljefe]

Sorry. Didn't mean to close. Did a mistake rebasing. Will push in a minute. referenced new PR