Replaced HTTP where HTTPS was available

[yackermann]

I found that most of the links in current style guide still been using HTTP. I went through all HTTP links and those that had supported HTTPS been replaces with HTTPS version.

4 links about VIM been using goo.gl link shortening(https://goo.gl/CUXJZC). I have replaced them with actual link.

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[yackermann]

I signed it!

2016-04-01 21:48 GMT+13:00 googlebot [email protected]:

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#118 (comment)

[googlebot]

CLAs look good, thanks!

[geoffromer]

This doesn't seem to be a Markdown file, so I don't think it should have Markdown-style links.

[yackermann]

@geoffromer Ooops. True XD

[yackermann]

@geoffromer Done!*)