text transformation added

Transform text in components with text capitalization classes.

less/type.less

@@ -97,6 +97,11 @@ mark,
 .text-center         { text-align: center; }
 .text-justify        { text-align: justify; }
 
+// Transformation
+.text-lowercase      { text-transform: lowercase; }
+.text-uppercase      { text-transform: uppercase; }
+.text-capitalize     { text-transform: capitalize; }
+
 // Contextual colors
 .text-muted {
   color: @text-muted;