added a basic markdown block to clean up marked output

client/less/site/markdown.less

@@ -0,0 +1,9 @@
+.markdown-block {
+  font-size: @global-font-size;
+  line-height: @global-line-height;
+  color: @global-color;
+
+  p:last-of-type {
+    margin-bottom: 0;
+  }
+}

client/less/style.common.less

@@ -10,13 +10,14 @@
 @import "site/kaleidoscope-event.less";
 @import "site/nav.less";
 
+@import "site/button.less";
 @import "site/content.less";
 @import "site/core-node.less";
 @import "site/dashboard.less";
-@import "site/site.less";
 @import "site/form.less";
-@import "site/button.less";
-@import "site/sidebar.less";
+@import "site/markdown.less";
 @import "site/section.less";
+@import "site/sidebar.less";
+@import "site/site.less";
 
 @import "site/chat.less";