all files accounted for

stylesheets/_css-slideshow.scss

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+// CSS SLIDESHOWS
+// Plugin by Eric Meyer - http://www.oddbird.net/
+// Based on the work of Jenna Smith - http://growldesign.co.uk/
+
+// Compatible with IE6+, Mozilla and Webkit browsers.
+// **Not compatible with Opera without Javascript help**
+
+// Override with the proper class names for your slide/slide-nav containers
+$slide-container: ".slides" !default;
+
+$max-slides: 10 !default;
+
+// import lightboxes
+@import "css-slideshow/slideshow";

stylesheets/css-slideshow/_slideshow.scss

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+// Apply +slideshow to the slideshow container
+@mixin slideshow($slides: $slide-container, $count: $max-slides) {
+  #{$slides} {
+    width: 100%;
+    overflow: hidden;
+
+    > ul {
+      margin: 0;
+      padding: 0;
+      width: 103% * $count;
+      @include no-bullets;
+      @include clearfix;
+
+      > li {
+        @include float(left);
+        width: 100% / (1.03 * $count);
+        margin-right: .5% / (1.03 * $count);
+      } 
+    } 
+  } 
+}

templates/project/_slideshow.scss

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+// CSS-only Lightboxes
+// Plugin by Eric Meyer - http://www.oddbird.net/
+// Based on the work of Jenna Smith - http://growldesign.co.uk/
+
+// Compatible with IE6+, Mozilla and Webkit browsers.
+// **Not compatible with Opera without Javascript help**
+
+// Override with the proper class names for your slide/slide-nav containers
+$slide-container: ".slides";
+
+$max-slides: 10;
+
+// import lightboxes
+@import "css-slideshow";
+
+// Make a slideshow
+.slideshow {
+  @include slideshow;
+
+  // Style the slideshow yourself
+  #{$slide-container} {
+    background: #cccccc;
+
+    .content {
+      padding: 1.5em; 
+    }
+
+    h2 {
+      padding: 0.75em;
+      background: #aaaaaa; 
+    } 
+  } 
+}