Merge pull request #503 in VISUAL/fineui from ~IMP/fineui_fui:master to master

* commit '62bd46dfc26ab506a2763f14c928e6f1454cee0f':
  build
  字体常量

src/less/lib/constant.less

@@ -8,6 +8,11 @@
 @font-size-14: 14px;
 @font-size-16: 16px;
 @font-size-22: 22px;
+@font-size-24: 24px;
+@font-size-30: 30px;
+@font-size-40: 40px;
+@font-size-50: 50px;
+@font-size-60: 60px;
 @font-size-70: 70px;
 @radius-2: 2px;
 @radius-6: 6px;