1. Added image tag plugin

2. Removed figure tag plugin
3. Renamed custom_filters to octopress_filters
4. Added styles to support new image tag plugin

Author: imathis

.themes/classic/sass/partials/_blog.scss

@@ -42,14 +42,32 @@ article {
     font-size: 2.0em; font-style: italic;
     line-height: 1.3em;
   }
-  .entry-content {
-    img, video { max-width: 100%; height: auto; }
-    video {
-      width: 100%; display: block; margin-bottom: 1.5em;
-      padding: .8em; background: #fff; border: 1px solid #eee;
-      @include box-sizing(border-box);
+  img {
+    max-width: 100%;
+    border: .5em solid #fff;
+    @include border-radius(.3em);
+    @include box-shadow(rgba(#000, .15) 0 1px 4px);
+    @include box-sizing(border-box);
+    display: block;
+    margin: 0 auto 1.5em;
+    &.left {
+      float: left;
+      margin-right: 1.5em;
+    }
+    &.right {
+      float: right;
+      margin-left: 1.5em;
+    }
+    &.left, &.right {
+      margin-bottom: .8em;
     }
   }
+  img, video { max-width: 100%; height: auto; }
+  video {
+    width: 100%; display: block; margin-bottom: 1.5em;
+    padding: .8em; background: #fff; border: 1px solid #eee;
+    @include box-sizing(border-box);
+  }
   .flash-video {
     max-width: 100%;
     margin-bottom: 1.5em;

plugins/figure_tag.rb

@@ -0,0 +1,41 @@
+# Title: Simple Image tag for Jekyll
+# Author: Brandon Mathis http://brandonmathis.com
+# Description: Easily output images with optional class names and title/alt attributes
+#
+# Syntax {% image [class name(s)] url [title text] %}
+#
+# Example:
+# {% imaeg left half http://site.com/images/ninja.png Ninja Attack! %}
+#
+# Output:
+# <image class='left' src="http://site.com/images/ninja.png" title="Ninja Attack!" alt="Ninja Attack!">
+#
+
+module Jekyll
+
+  class ImageTag < Liquid::Tag
+    @img = nil
+    @title = nil
+    @class = ''
+
+    def initialize(tag_name, markup, tokens)
+      if markup =~ /(\S.*\s+)?(https?:\/\/|\/)(\S+)(\s+.+)?/i
+        @class = $1
+        @img = $2 + $3
+        @title = $4
+      end
+      super
+    end
+
+    def render(context)
+      output = super
+      if @img
+        figure =  "<img class='#{@class}' src='#{@img}' alt='#{@title}' title='#{@title}'>"
+      else
+        "Error processing input, expected syntax: {% img [class name(s)] /url/to/image [title text] %}"
+      end
+    end
+  end
+end
+
+Liquid::Template.register_tag('img', Jekyll::ImageTag)