docs updates, forms updated to include error states and more examples, remove text-shadow from gradientbar mixin to fix bug

lib/forms.less

@@ -325,6 +325,7 @@ textarea[readonly] {
 // Allow us to put symbols and text within the input field for a cleaner look
 .input-prepend,
 .input-append {
+  overflow: hidden;
   input {
     .border-radius(0 3px 3px 0);
   }

lib/mixins.less

@@ -205,7 +205,6 @@
 
 // Gradient Bar Colors for buttons and alerts
 .gradientBar(@primaryColor, @secondaryColor) {
-  text-shadow: 0 -1px 0 rgba(0,0,0,.25);
   #gradient > .vertical(@primaryColor, @secondaryColor);
   border-color: @secondaryColor @secondaryColor darken(@secondaryColor, 15%);
   border-color: rgba(0,0,0,.1) rgba(0,0,0,.1) fadein(rgba(0,0,0,.1), 15%);

lib/patterns.less

@@ -575,6 +575,12 @@ input[type=submit].btn {
     .box-shadow(0 1px 0 rgba(255,255,255,.25));
   }
 
+  &.error,
+  &.success,
+  &.info {
+    text-shadow: 0 -1px 0 rgba(0,0,0,.25);
+  }
+
   &.block-message {
     padding: 14px;
     background-image: none;