README.md in gemsmith-2.1.0 vs README.md in gemsmith-2.2.0

@@ -23,18 +23,23 @@
 * Provides the ability to open any installed gem within your favorite editor.
 
 # Requirements
 
 1. A UNIX-based system.
-2. [Ruby 2.0.x](http://www.ruby-lang.org).
+2. [Ruby 2.x.x](http://www.ruby-lang.org).
 3. [RubyGems](http://rubygems.org).
 4. [Bundler](https://github.com/carlhuda/bundler).
 
 # Setup
 
-Type the following from the command line to install:
+Type the following from the command line to securely install (recommended):
 
+    gem cert --add <(curl -Ls http://www.redalchemist.com/gem-public.pem)
+    gem install gemsmith -P HighSecurity
+
+...or type the following to insecurely install (not recommended):
+
     gem install gemsmith
 
 You can configure common settings for future gem builds by creating the following file:
 
     ~/.gemsmith/settings.yml
@@ -133,9 +138,17 @@
 * [How to Spread the Word About Your Code](https://hacks.mozilla.org/2013/05/how-to-spread-the-word-about-your-code)
 * [Ruby Toolbox](https://www.ruby-toolbox.com)
 * [RubyFlow](http://www.rubyflow.com)
 * [The Ruby Show](http://rubyshow.com)
 * [Ruby 5](http://ruby5.envylabs.com)
+
+# Versioning
+
+Read [Semantic Versioning](http://semver.org) for details. Briefly, it means:
+
+* Patch (x.y.Z) - Incremented for small, backwards compatible bug fixes.
+* Minor (x.Y.z) - Incremented for new, backwards compatible public API enhancements and/or bug fixes.
+* Major (X.y.z) - Incremented for any backwards incompatible public API changes.
 
 # Contributions
 
 Read CONTRIBUTING for details.