Added Amazon Relational Database Service (RDS) command line tools

Signed-off-by: Adam Vandenberg <flangy@gmail.com>

* Updated to use aws tools base class.

Formula/rds-command-line-tools.rb

@@ -0,0 +1,29 @@
+require 'formula'
+
+# Require ec2-api-tools to get the base class
+require "#{File.dirname __FILE__}/ec2-api-tools.rb"
+
+class RdsCommandLineTools <AmazonWebServicesFormula
+  homepage 'http://developer.amazonwebservices.com/connect/entry.jspa?externalID=2928'
+  url      'http://s3.amazonaws.com/rds-downloads/RDSCli.zip'
+  md5      'a4c7f9efca4c19b9f9073945a5bbc7b9'
+  version  '1.1.005'
+
+  def install
+    standard_install
+  end
+
+  def caveats
+    s = standard_instructions "AWS_RDS_HOME"
+    s += <<-EOS.undent
+
+      To check that your setup works properly, run the following command:
+
+        rds-describe-db-instances --headers
+
+      You should see a header line. If you have database instances already configured,
+      you will see a description line for each database instance.
+    EOS
+    return s
+  end
+end