README.md in rapinoe-0.0.3 vs README.md in rapinoe-0.0.4

@@ -6,11 +6,19 @@
 
 Primarily it's designed to help you access the simple metadata of a Keynote file: return how many slides there are, extract the slide previews baked into the file, tell you various details about the file itself on disk, and so on.
 
 ## Install
 
+First you'll need ImageMagick. If you use Homebrew, you'll be fine with a quick:
+
 ```sh
+brew install imagemagick
+```
+
+Then install the gem:
+
+```sh
 gem install rapinoe
 ```
 
 ## Usage
 
@@ -27,6 +35,12 @@
 rapinoe.slides.first.write_preview_to_file("/tmp/slide-preview.jpg")
 # => writes the Keynote-generated slide preview to a file
 
 rapinoe.widescreen?
 # => true
+
+rapinoe.colors
+# Returns the dominant colors in the first title slide by percentage order. Keys
+# are in RGB format.
+#
+# => {[108, 190, 212]=>0.9550793650793651, [117, 124, 143]=>0.012619047619047618, [125, 83, 100]=>0.010158730158730159, [143, 23, 33]=>0.009603174603174603, [151, 10, 16]=>0.007301587301587302, [133, 49, 62]=>0.005238095238095238}
 ```