[ImgBot] Optimize images

[imgbot[bot]]

Beep boop. Your images are optimized!

Your image file size has been reduced!

Details

File	Before	After	Percent reduction
/docs/img/top-back.jpg	33.14kb	30.32kb	8.50%
/fonts/glyphicons-halflings-regular.svg	106.19kb	103.92kb	2.14%
/fonts/fontawesome-webfont.svg	306.05kb	301.86kb	1.37%
Total :	445.38kb	436.10kb	2.08%

---

📝docs | :octocat: repo | 🙋issues | 🏅swag | 🏪marketplace