add some icons and delete demo

icons/python/python-plain.svg

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Generator: Adobe Illustrator 16.0.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
+	 width="500px" height="500px" viewBox="0 0 500 500" enable-background="new 0 0 500 500" xml:space="preserve">
+<g>
+	<path fill="#FFD845" d="M192.693,242h113.904C338.305,242,364,215.36,364,183.521V74.932c0-30.907-26.266-54.125-57.211-59.281
+		c-19.59-3.26-40.011-4.743-59.509-4.653c-19.496,0.091-37.995,1.751-54.375,4.653C144.644,24.174,136,42.021,136,74.932V119h114v14
+		H135.675H92.874c-33.142,0-62.162,19.859-71.24,57.761c-10.472,43.436-10.937,70.806,0,116.162
+		C29.74,340.682,49.097,365,82.241,365H122v-52.689C122,274.669,154.017,242,192.693,242z M185.515,89.414
+		c-11.823,0-21.396-9.685-21.396-21.66c0-12.025,9.572-21.8,21.396-21.8c11.777,0,21.4,9.775,21.4,21.8
+		C206.915,79.729,197.292,89.414,185.515,89.414z"/>
+	<path fill="#FFD845" d="M477.657,190.761C469.464,157.764,453.821,133,420.635,133H378v50.521C378,222.778,344.552,256,306.598,256
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+		c36.096,10.611,70.823,12.532,114.016,0C335.578,471.996,364,455.269,364,422.366V379H250v-14h113.615h57.02
+		c33.141,0,45.496-23.378,57.022-58.077C489.563,271.198,489.051,236.583,477.657,190.761z M313.771,407.877
+		c11.824,0,21.4,9.684,21.4,21.668c0,12.017-9.576,21.792-21.4,21.792c-11.777,0-21.396-9.775-21.396-21.792
+		C292.376,417.561,301.994,407.877,313.771,407.877z"/>
+</g>
+</svg>