[ImgBot] optimizes images

*Total -- 88.89kb -> 73.59kb (17.22%)

/resources/civetweb_16x16@2.png -- 1.59kb -> 0.65kb (58.74%)
/resources/duktape-logo.png -- 1.70kb -> 0.93kb (45.55%)
/resources/civetweb_16x16.png -- 1.65kb -> 0.91kb (44.83%)
/resources/civetweb_22x22.png -- 1.81kb -> 1.08kb (40.71%)
/resources/luaxml-logo.jpg -- 6.58kb -> 4.00kb (39.19%)
/resources/luasqlite-logo.jpg -- 6.38kb -> 3.96kb (37.97%)
/resources/civetweb_32x32.png -- 2.14kb -> 1.39kb (35.02%)
/resources/luafilesystem-logo.jpg -- 8.02kb -> 5.54kb (30.95%)
/resources/civetweb_22x22@2.png -- 2.66kb -> 1.92kb (28.12%)
/resources/civetweb_64x64.png -- 3.83kb -> 3.06kb (20.06%)
/resources/civetweb_32x32@2.png -- 3.83kb -> 3.06kb (20.06%)
/resources/civetweb_64x64@2.png -- 9.94kb -> 9.06kb (8.8%)
/src/third_party/lua-5.2.4/doc/osi-certified-72x60.png -- 3.69kb -> 3.48kb (5.51%)
/src/third_party/lua-5.3.4/doc/osi-certified-72x60.png -- 3.69kb -> 3.48kb (5.51%)
/src/third_party/lua-5.1.5/doc/cover.png -- 3.23kb -> 3.09kb (4.36%)
/test/imagetest/96.png -- 0.75kb -> 0.73kb (1.57%)
/test/imagetest/65.png -- 0.71kb -> 0.70kb (1.24%)
/test/imagetest/36.png -- 0.72kb -> 0.71kb (1.22%)
/test/imagetest/69.png -- 0.75kb -> 0.74kb (1.17%)
/test/imagetest/49.png -- 0.62kb -> 0.62kb (1.1%)
/test/imagetest/06.png -- 0.73kb -> 0.72kb (1.07%)
/test/imagetest/90.png -- 0.74kb -> 0.73kb (0.93%)
/test/imagetest/98.png -- 0.76kb -> 0.75kb (0.9%)
/test/imagetest/03.png -- 0.72kb -> 0.72kb (0.81%)
/test/imagetest/38.png -- 0.73kb -> 0.72kb (0.8%)
/test/imagetest/62.png -- 0.69kb -> 0.69kb (0.7%)
/test/imagetest/92.png -- 0.70kb -> 0.69kb (0.7%)
/test/imagetest/30.png -- 0.72kb -> 0.71kb (0.68%)
/test/imagetest/63.png -- 0.73kb -> 0.72kb (0.67%)
/test/imagetest/60.png -- 0.73kb -> 0.73kb (0.67%)
/test/imagetest/08.png -- 0.74kb -> 0.74kb (0.66%)
/test/imagetest/04.png -- 0.61kb -> 0.60kb (0.64%)
/test/imagetest/89.png -- 0.76kb -> 0.75kb (0.64%)
/test/imagetest/40.png -- 0.61kb -> 0.60kb (0.64%)
/test/imagetest/20.png -- 0.68kb -> 0.68kb (0.57%)
/test/imagetest/29.png -- 0.70kb -> 0.69kb (0.56%)
/test/imagetest/56.png -- 0.70kb -> 0.70kb (0.56%)
/test/imagetest/95.png -- 0.71kb -> 0.71kb (0.55%)
/test/imagetest/09.png -- 0.74kb -> 0.74kb (0.53%)
/test/imagetest/94.png -- 0.62kb -> 0.62kb (0.47%)
/test/imagetest/52.png -- 0.65kb -> 0.64kb (0.45%)
/test/imagetest/50.png -- 0.69kb -> 0.69kb (0.42%)
/test/imagetest/83.png -- 0.73kb -> 0.73kb (0.4%)
/test/imagetest/86.png -- 0.75kb -> 0.75kb (0.39%)
/test/imagetest/68.png -- 0.75kb -> 0.75kb (0.39%)
/test/imagetest/99.png -- 0.58kb -> 0.57kb (0.34%)
/test/imagetest/16.png -- 0.59kb -> 0.58kb (0.33%)
/test/imagetest/64.png -- 0.62kb -> 0.61kb (0.32%)
/test/imagetest/46.png -- 0.62kb -> 0.62kb (0.32%)
/test/imagetest/70.png -- 0.63kb -> 0.62kb (0.31%)
/test/imagetest/97.png -- 0.64kb -> 0.64kb (0.3%)
/test/imagetest/05.png -- 0.69kb -> 0.69kb (0.28%)
/test/imagetest/80.png -- 0.74kb -> 0.74kb (0.26%)
/test/imagetest/66.png -- 0.57kb -> 0.57kb (0.17%)
/test/imagetest/73.png -- 0.62kb -> 0.62kb (0.16%)
/test/imagetest/76.png -- 0.63kb -> 0.63kb (0.15%)