css helper class

应该习惯的css helper class

.text-centeredtext-align: center;
.text-righttext-align: right;
.smallsmall font size from variables.less
.lastmargin-right: 0;
.pausemargin-bottom: baseline/2;
.endmargin-bottom: 0;
.normalfont-weight: normal;
.boldfont-weight: bold;
.italicfont-style: italic;
.groupclearfix layer
.rightfloat: right;
.leftfloat: left;
.nowrapwhite-space: nowrap;
.req.requiredfont-weight: normal; + red color from variables.less
.successgreen color from variables.less
.errorred color from variables.less
.color-graycolor: #777;
.color-gray-lightcolor: #999;
.color-blackcolor: #000;
.color-redred color from variables.less
.color-greengreen color from variables.less
.no-wrap-lineoverflow: hidden;text-overflow: ellipsis;white-space: nowrap;display: block