Fixed bugs with sizing, added some attributions.

less/_core.less

@@ -1,6 +1,8 @@
 // base class definition
 // --------------------------
 
+// lifted from FontAwesome
+// https://github.com/FortAwesome/Font-Awesome/blob/6549e2920b0a27213b895200becc485ab01e9974/less/core.less
 .@{wi-css-prefix} {
 
   display: inline-block;

less/_font.less

@@ -1,6 +1,8 @@
 // icon font
 // --------------------------
 
+// lifted from FontAwesome
+// https://github.com/FortAwesome/Font-Awesome/blob/6549e2920b0a27213b895200becc485ab01e9974/less/path.less
 @font-face {
 
   font-family: 'WeatherIcons';

less/_sizes.less

@@ -8,10 +8,10 @@
   @wi-icon-scale-name-unquoted: ~"@{wi-icon-scale-name}";
   @wi-icon-scale: extract(extract(@wi-icon-scales, @iterator), 2);
 
-  .@{wi-css-prefix}-@{wi-icon-scale-name} {
+  .@{wi-css-prefix}-@{wi-icon-scale-name-unquoted} {
 
-    font-size: floor(@wi-font-size-base / unit(@wi-font-size-base * @wi-icon-scale));
-    line-height: floor(@wi-font-size-base * @wi-icon-scale / unit(@wi-font-size-base));
+    font-size: floor(@wi-font-size-base * @wi-icon-scale);
+    line-height: floor((@wi-font-size-base * @wi-icon-scale * 0.75);
     vertical-align: -15%;
   }
 
@@ -28,7 +28,7 @@
 
   .@{wi-css-prefix}-@{wi-icon-multiplier-name-unquoted} {
 
-    font-size: floor((@wi-font-size-base * @wi-icon-multiplier), 3);
+    font-size: floor(@wi-font-size-base * @wi-icon-multiplier);
   }
 
   .createIconMultipliers((@iterator + 1));