Optimize some SVG paths (#798)

* Optimize some SVG paths

* Update icons sizes in README

images/svg/humblebundle.svg

@@ -2,4 +2,4 @@
 aria-label="Humble Bundle" role="img"
 viewBox="0 0 512 512"><path
 d="m0 0H512V512H0"
-fill="#fff"/><path d="M333.3,287c4.3,2.4,16.3,8.9,16.2,50.8q0,35.8-24.5,53.6t-71.3,17.7c-33.9,0-59.9-6.6-77.8-19.8s-28.7-39.1-28.8-75c0-27.2,8.3-48.9,24.6-65.1,24.3-22.9,66.4-38.1,67.1-38.4q45.8-17.6,58.8-41.1a31.6,31.6,0,0,0,4.5-16.4c0-5.7-1.4-10-4.5-12.8s-3.5-4.6-1.3-5c4.1.6,17.9,14.6,15.2,31.2a100.9,100.9,0,0,1-11.4,33.8c-5.1,9.2-13.8,20.4-26,33.5-14.8,15.1-29.3,35.1-31.5,38.1-17.8,24.3-11.4,44.2-11.4,44.2,2.1,6.6,8,11.8,18,16-2.6-2.1-9.8-12.1-10-28.7,0-6.9,3.7-16.1,13.5-27.2,5.3-6.9,22.7-19,22.4-19ZM256.2,153.5c0,10.1,4.7,19.7,14.1,29l-16.9,9.4a82.7,82.7,0,0,1-6.9-34,25.2,25.2,0,0,1,12.6-21.6c2.7-1.3,4-1.3,4-.2s-.8,2.5-2.1,3.9c-3.1,3-4.6,7.5-4.8,13.5ZM244,197.4l-32.2,12.5L104.6,153.8c-4.2-2.1-10.2-8.2-4-18.1s12.6-6.5,15.5-5.1Zm53.6,28,145.3,75.1c5.8,3.2,6.7,8.4,2.4,16.6s-10.1,8.6-13.8,6.9L281,245.8Z" fill="#cc2929"/></svg>
+fill="#fff"/><path d="M281 245.8 431.5 324c3.7 1.7 9.5 1.3 13.8-6.9s3.4-13.4-2.4-16.6L297.6 225.4ZM116.1 130.6c-2.9-1.4-9.3-4.8-15.5 5.1s-.2 16 4 18.1l107.2 56.1L244 197.4Zm140.1 22.9c.2-6 1.7-10.5 4.8-13.5 1.3-1.4 2.1-2.8 2.1-3.9s-1.3-1.1-4 .2a25.2 25.2 0 00-12.6 21.6 82.7 82.7 0 006.9 34l16.9-9.4c-9.4-9.3-14.1-18.9-14.1-29Zm18.9 103.9c.3 0-17.1 12.1-22.4 19-9.8 11.1-13.5 20.3-13.5 27.2.2 16.6 7.4 26.6 10 28.7-10-4.2-15.9-9.4-18-16 0 0-6.4-19.9 11.4-44.2 2.2-3 16.7-23 31.5-38.1 12.2-13.1 20.9-24.3 26-33.5a100.9 100.9 0 0011.4-33.8c2.7-16.6-11.1-30.6-15.2-31.2-2.2.4-1.8 2.2 1.3 5s4.5 7.1 4.5 12.8a31.6 31.6 0 01-4.5 16.4q-13 23.5-58.8 41.1c-.7.3-42.8 15.5-67.1 38.4-16.3 16.2-24.6 37.9-24.6 65.1.1 35.9 10.9 61.8 28.8 75s43.9 19.8 77.8 19.8q46.8.1 71.3-17.7t24.5-53.6c.1-41.9-11.9-48.4-16.2-50.8Z" fill="#cc2929"/></svg>