Add multiclassing

Changes:
 + add multiclassing option
 + add edit and delete item for class

source/style/Character-sheet.less

@@ -365,4 +365,27 @@
 			}
 		}
 	}
+
+	.chip {
+		display: inline-block;
+		padding: 0 25px;
+		height: 35px;
+		font-size: 16px;
+		line-height: 35px;
+		border-radius: 25px;
+		background-color: #f1f1f1;
+	}
+
+	.closebtn {
+		padding-left: 10px;
+		color: #888;
+		font-weight: bold;
+		float: right;
+		font-size: 20px;
+		cursor: pointer;
+	}
+
+	.closebtn:hover {
+		color: #000;
+	}
 }