Update documentation and gemspec.

Author: parkr

README.md

@@ -1,6 +1,6 @@
 # Jekyll::Gist
 
-TODO: Write a gem description
+Liquid tag for displaying GitHub Gists in Jekyll sites: `{% gist %}`.
 
 ## Installation
 
@@ -18,11 +18,29 @@ Or install it yourself as:
 
 ## Usage
 
-TODO: Write usage instructions here
+Use the tag as follows in your Jekyll pages, posts and collections:
+
+```liquid
+{% gist parkr/c08ee0f2726fd0e3909d %}
+```
+
+This will create the associated script tag:
+
+```html
+<script src="https://gist.github.com/parkr/c08ee0f2726fd0e3909d.js"> </script>
+```
+
+You may optionally specify a `filename` after the `gist_id`:
+
+```liquid
+{% gist parkr/c08ee0f2726fd0e3909d test.md %}
+```
+
+This will produce the correct URL to show just the specified file in your post rather than the entire Gist.
 
 ## Contributing
 
-1. Fork it ( https://github.com/[my-github-username]/jekyll-gist/fork )
+1. Fork it ( https://github.com/jekyll/jekyll-gist/fork )
 2. Create your feature branch (`git checkout -b my-new-feature`)
 3. Commit your changes (`git commit -am 'Add some feature'`)
 4. Push to the branch (`git push origin my-new-feature`)

jekyll-gist.gemspec

@@ -1,16 +1,15 @@
 # coding: utf-8
 lib = File.expand_path('../lib', __FILE__)
 $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
-require 'jekyll/gist/version'
+require 'jekyll-gist/version'
 
 Gem::Specification.new do |spec|
   spec.name          = "jekyll-gist"
   spec.version       = Jekyll::Gist::VERSION
   spec.authors       = ["Parker Moore"]
   spec.email         = ["[email protected]"]
-  spec.summary       = %q{TODO: Write a short summary. Required.}
-  spec.description   = %q{TODO: Write a longer description. Optional.}
-  spec.homepage      = ""
+  spec.summary       = %q{Liquid tag for displaying GitHub Gists in Jekyll sites.}
+  spec.homepage      = "https://github.com/jekyll/jekyll-gist"
   spec.license       = "MIT"
 
   spec.files         = `git ls-files -z`.split("\x0")