Introduce new icons from the Tango project These icons are in the Public Domain Change-Id: I1240e45d5b1a8aa5c333039916f160364599a345

diff --git a/gitiles-servlet/src/main/resources/com/google/gitiles/static/gitiles.css b/gitiles-servlet/src/main/resources/com/google/gitiles/static/gitiles.css
index 55450ec..23cefad 100644
--- a/gitiles-servlet/src/main/resources/com/google/gitiles/static/gitiles.css
+++ b/gitiles-servlet/src/main/resources/com/google/gitiles/static/gitiles.css

@@ -187,23 +187,23 @@
  * http://www.apache.org/icons/ */
 ol.files li.git-tree{
   /* small/folder.png */
-  list-style-image: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABmJLR0QAAAAAAAD5Q7t/AAAACXBIWXMAAABIAAAASABGyWs+AAAACXZwQWcAAAAQAAAAEABcxq3DAAAA+klEQVQ4y63TMWvCQBjG8f8r+RouRSe7ONchuCTQsZS6FNLBSQrdi1PmFhcnhwpOUjoK3iIvRWcdnP0q16FcSOSijfSZjht+PNy9r6gqAGEYWgBVFSpEANtq1nl7TQCIk5Q8dA4OAPZmxHX0AsByOiw0Wk6HRJ020vBDAlh7+MouHOQauUSdNma9JU7SAhIcV9qbkRcy6633DQJKUgb9GTiG5Ooue598aucAAPO9A+Djc3UZcCr/A/Se37OalQFVlfliQ5ykF0E1+J2uKtCg/2jdufCN+fmfLzY83N7wdN8tRcaTmXjnwAeVRdw6n4pbLIBWsw7AeDITgB/OTHEfF3G6oAAAAABJRU5ErkJggg==);
+  list-style-image: url(data:image/png;base64,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);
 }
 ol.files li.symlink{
   /* small/forward.png */
-  list-style-image: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAQAAAC1+jfqAAAAAmJLR0QAAKqNIzIAAAAJcEhZcwAAAEgAAABIAEbJaz4AAAAJdnBBZwAAABAAAAAQAFzGrcMAAACtSURBVCjPfZGxEYMwDEWffNTswApcGs+RY4KUtDSZgIbWJRNwWSHnjibHCtkhCyiFDYYE+Krk/0/S9xdPQq4f4QfZuukpFC6yI3jpIz4UexPuyiFMrsMJDebJOcwbx5WSMl4QTsyXqVkBNFig5AagwU+1dTECI446unBM2ga7nXJQVj0ePPWpxEAlHfbQhfglg0EnxhVlaSUK5qhg/pUm0htBkkFPJasV/0jBfwHsdko9kUCoMwAAAABJRU5ErkJggg==);
+  list-style-image: url(data:image/png;base64,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);
 }
 ol.files li.regular-file{
   /* small/text.png */
-  list-style-image: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAQAAAC1+jfqAAAAAmJLR0QAAKqNIzIAAAAJcEhZcwAAAEgAAABIAEbJaz4AAAAJdnBBZwAAABAAAAAQAFzGrcMAAACDSURBVCjPYzzAgB8woQuc+Y/KZzz33xCJe55BkmEpgwkjHhMkGKJRTMFQcJ7hOYMJI0IJCwMDA4MVXPoYhP2fgcEEWcE6JBOOMRxkZGBYjWpCEJI0A4P9/xdIGtBMeMHAwCDBIIGuIIgBFRzDbQImoJcJx/CZ8Imx9/99DOFzDKFQFgBj6yGwhtEzOwAAAABJRU5ErkJggg==)
+  list-style-image: url(data:image/png;base64,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)
 }
 ol.files li.executable-file{
   /* small/patch.png */
-  list-style-image: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAQAAAC1+jfqAAAAAmJLR0QA/4ePzL8AAAAJcEhZcwAAAEgAAABIAEbJaz4AAAAJdnBBZwAAABAAAAAQAFzGrcMAAACDSURBVCjPlY+xDYMwEEW/I4agZYRQsgojkC4ZAzp2ojMjuPQYjwJEcvgSKV+yzrKenv9J/2bk8hD5TCRjkdvVUKs3lgJYlfUKbyRE7gbojrkEtwOAJA18/UKC7HWYjrMXLYBJSQ+lEymAp+x0DHY6hkazGsfgrAnwc02bqg0jqfSetw2j7lch7TZvfQAAACR0RVh0Y29tbWVudABieSBNYXJ0aW4uS3JhZW1lckBNY2guU05JLkRlaCPF6QAAAABJRU5ErkJggg==);
+  list-style-image: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABmJLR0QA/wD/AP+gvaeTAAABzElEQVQ4jaWTu87aMBzFjx0HEpJ4YCkLW5dI3XgKBO0L8ALwCO3adwJRsSCxZkGwlMCQABHiMoUK+vnSoU3ktP269EiWb/Hx7/yTAP8pUgyiKPrKOeeEECKl1EopaK1R9FprSCkhpcT5fM673e5bAGCFge/73LKsN4z9XCKEgBBSjk1prctzzNyglIJSCq01KKWvGpgqDYQQcBynNCgITJIytzGvEJjo/zKoUBu5KuhFnKIlSYLFYgFK6esGtm2Xh02T7XaL3W6Hw+GA2Wz29xqYuQGUJpvNBkmSoF6vo9FoYLVa4XK5OH8QKKXwfD4rdYjjGPv9Hp7ngTEG3/fxeDzgOE5jNBp9qhAopcoIxc1ZliEIgpLofr+j0+mAEELa7fbHwWDwrBAUHxEAxHGMIAhg2zZs20ae52CMwXVdpGkKz/N8z/O6lRqY6vV6GI/HyPMcQggIIRCGIbIsg+/7WC6XX9I0/VAhMKW1Rr/fB+cclFK4rgvGGGq1Gm6328t8Pn8/mUyeJcHxeLwLIc6EECaltKSUFiGEtlotcjqdLM65rZTC9Xp9CcMwW6/X3wHjb/xNDEAAoP7rTT2Gw+HnZrP5bjqddqMo+lY8+APFnM1hw1FxXAAAAABJRU5ErkJggg==);
 }
 ol.files li.gitlink{
   /* small/continued.png */
-  list-style-image:url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAQAAAC1+jfqAAAAAmJLR0QAAKqNIzIAAAAJcEhZcwAAAEgAAABIAEbJaz4AAAAJdnBBZwAAABAAAAAQAFzGrcMAAACPSURBVCjPzdCxbcNAFIPh7wQvkTIjBEjj1iscXGUSTZDGLjVCKuFWCK5Lc/AKGoUppNq1Wf18IB4Ilu65Ji8SmDOy2znzQeOgiTmLZoQ1VbWGkWYxh2mk+vBdGh6+XDzQLN5UIyc2d9vx+Ad/4BdNpTtHzrmlu0UctF+70rHm3WeBNVzLXnJzLfbAKyz5TP/rekGK5PrZfgAAAABJRU5ErkJggg==);
+  list-style-image:url(data:image/png;base64,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);
 }