README.md in usps_flags-0.3.13 vs README.md in usps_flags-0.3.14

@@ -2,10 +2,11 @@
 
 [![Gem Version](https://img.shields.io/gem/v/usps_flags.svg)](https://rubygems.org/gems/usps_flags)
 [![Build Status](https://travis-ci.org/jfiander/usps-flags.svg)](https://travis-ci.org/jfiander/usps-flags)
 [![Test Coverage](https://api.codeclimate.com/v1/badges/760b824f0edac3316a11/test_coverage)](https://codeclimate.com/github/jfiander/usps-flags/test_coverage)
 [![Maintainability](https://api.codeclimate.com/v1/badges/760b824f0edac3316a11/maintainability)](https://codeclimate.com/github/jfiander/usps-flags/maintainability)
+[![Dependencies](https://img.shields.io/gemnasium/jfiander/usps-flags.svg)](https://gemnasium.com/github.com/jfiander/usps-flags)
 
 This gem allows you to generate precise SVG and PNG flag images based on
 official specifications.
 
 ## Installation
@@ -35,10 +36,15 @@
 - Officer insignia
 - Official pennants
 
 ## Testing
 
-Tests are written in Rspec. To run all specs in a cloned repo, run 'rake'.
+Tests are written in Rspec.
+
+To run all specs, run `rake` or `rspec`.
+
+To run most specs, but skip the static file generators (which can be slow), run
+`rspec --tag '~slow'`.
 
 ## Generation
 
 ### All files