Updating Bootstrap to v.2.0.0

roots-actions.php:  added responsive css framework file
roots-options.php: changed default css classes for bootstrap v2.0.0
roots-scripts.php: updated less to v1.2.1, changed the load order and
added new scripts for bootstrap v2.0.0

Added all of the new css, js, less asset files and updated all of the
previous ones for bootstrap v2.0.0

css/bootstrap/lib/alerts.less

@@ -0,0 +1,70 @@
+// ALERT STYLES
+// ------------
+
+// Base alert styles
+.alert {
+  padding: 8px 35px 8px 14px;
+  margin-bottom: @baseLineHeight;
+  text-shadow: 0 1px 0 rgba(255,255,255,.5);
+  background-color: @warningBackground;
+  border: 1px solid @warningBorder;
+  .border-radius(4px);
+}
+.alert,
+.alert-heading {
+  color: @warningText;
+}
+
+// Adjust close link position
+.alert .close {
+  position: relative;
+  top: -2px;
+  right: -21px;
+  line-height: 18px;
+}
+
+// Alternate styles
+// ----------------
+
+.alert-success {
+  background-color: @successBackground;
+  border-color: @successBorder;  
+}
+.alert-success,
+.alert-success .alert-heading {
+  color: @successText;
+}
+.alert-danger,
+.alert-error {
+  background-color: @errorBackground;
+  border-color: @errorBorder;
+}
+.alert-danger,
+.alert-error,
+.alert-danger .alert-heading,
+.alert-error .alert-heading {
+  color: @errorText;
+}
+.alert-info {
+  background-color: @infoBackground;
+  border-color: @infoBorder;
+}
+.alert-info,
+.alert-info .alert-heading {
+  color: @infoText;
+}
+
+
+// Block alerts
+// ------------------------
+.alert-block {
+  padding-top: 14px;
+  padding-bottom: 14px;
+}
+.alert-block > p,
+.alert-block > ul {
+  margin-bottom: 0;
+}
+.alert-block p + p {
+  margin-top: 5px;
+}