Add illustrations for a potential blog post

Add illustrations for a potential blog post

First version, let see how that works out.

Patch by Benjamin Poulain <bpoulain@apple.com> on 2014-03-25

* blog-files/css-jit-introduction: Added.
* blog-files/css-jit-introduction/clicktostart.js: Added.
* blog-files/css-jit-introduction/css-jit-illustration.html: Added.
* blog-files/css-jit-introduction/html5-single-page-microbenchmark.html: Added.
* blog-files/css-jit-introduction/old-selectorchecker-illustration.html: Added.
* blog-files/css-jit-introduction/timing-illustration-eight-run.svg: Added.
* blog-files/css-jit-introduction/timing-illustration-five-run.svg: Added.
* blog-files/css-jit-introduction/timing-illustration-one-run.svg: Added.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@166280 268f45cc-cd09-0410-ab3c-d52691b4dbfc