[ImgBot] Optimize images

*Total -- 3,769.33kb -> 3,415.31kb (9.39%)

/assets/images/vfl/completeLayout.png -- 17.02kb -> 2.56kb (84.94%)
/assets/images/GSSv2.png -- 3.46kb -> 1.88kb (45.8%)
/assets/images/Demos/Demo1Thumbnail.png -- 441.12kb -> 314.42kb (28.72%)
/assets/images/ipad-flat.svg -- 1.02kb -> 0.77kb (24.88%)
/assets/grail_bootstrap/img/bootstrap/less-small.png -- 1.15kb -> 0.93kb (19.73%)
/assets/images/Demos/Demo2Thumbnail.jpg -- 45.44kb -> 37.73kb (16.95%)
/assets/images/Video/background.jpg -- 54.12kb -> 46.41kb (14.25%)
/assets/images/GSSLog.png -- 142.59kb -> 122.50kb (14.09%)
/assets/images/oreilly-fluent-cover-purple.jpg -- 114.08kb -> 98.05kb (14.05%)
/assets/images/gss-didot-white.svg -- 2.52kb -> 2.19kb (13.36%)
/assets/images/vfl/completeLayout copy.png -- 12.21kb -> 10.66kb (12.69%)
/assets/grail_bootstrap/img/glyphicons-halflings-d4.png -- 34.29kb -> 30.69kb (10.5%)
/assets/images/purple-yellow/paul.jpg -- 109.51kb -> 99.00kb (9.6%)
/assets/images/purple-yellow/carl.jpg -- 115.98kb -> 105.03kb (9.44%)
/assets/images/purple-yellow/yaro.jpg -- 104.14kb -> 94.45kb (9.3%)
/assets/grail_bootstrap/img/bootstrap/bird.png -- 3.02kb -> 2.76kb (8.44%)
/assets/images/fluent-video-cover.jpg -- 155.53kb -> 144.02kb (7.4%)
/assets/images/oreilly-fluent-cover.jpg -- 155.53kb -> 144.02kb (7.4%)
/assets/images/purple-yellow/tom.jpg -- 110.76kb -> 103.67kb (6.4%)
/assets/images/pug-purple-on-yellow.jpg -- 198.12kb -> 186.18kb (6.03%)
/assets/images/purple-yellow/bergie.jpg -- 131.30kb -> 123.80kb (5.71%)
/assets/images/purple-yellow/cassowary.jpg -- 197.75kb -> 186.90kb (5.49%)
/assets/images/pug.jpg -- 132.04kb -> 124.82kb (5.47%)
/assets/images/purple-yellow/kid.jpg -- 88.47kb -> 83.92kb (5.14%)
/assets/images/purple-yellow/alex.jpg -- 130.91kb -> 124.38kb (4.99%)
/assets/images/Intro/intro-bg.jpg -- 139.87kb -> 133.03kb (4.89%)
/assets/images/purple-yellow/d4.jpg -- 124.48kb -> 118.73kb (4.62%)
/assets/images/purple-yellow/greg.jpg -- 116.05kb -> 111.01kb (4.35%)
/assets/grail_bootstrap/img/bootstrap/examples/bootstrap-example-hero.jpg -- 21.76kb -> 20.86kb (4.12%)
/demos/profile-card/assets/avatar.jpg -- 50.22kb -> 48.32kb (3.79%)
/assets/grail_bootstrap/img/bootstrap/examples/bootstrap-example-fluid.jpg -- 25.23kb -> 24.37kb (3.4%)
/assets/images/purple-yellow/tom2.jpg -- 52.53kb -> 50.81kb (3.27%)
/assets/grail_bootstrap/img/bootstrap/bootstrap-mdo-sfmoma-01.jpg -- 127.58kb -> 123.79kb (2.97%)
/demos/profile-card/assets/cover.jpg -- 519.99kb -> 504.56kb (2.97%)
/assets/grail_bootstrap/img/bootstrap/bootstrap-mdo-sfmoma-02.jpg -- 82.52kb -> 81.15kb (1.66%)
/assets/grail_bootstrap/img/bootstrap/examples/bootstrap-example-starter.jpg -- 7.01kb -> 6.95kb (0.91%)

Signed-off-by: ImgBotApp <ImgBotHelp@gmail.com>

Author: ImgBotApp