add task to install a gem from the local git checkout

Author: breezeight

Rakefile

@@ -1,3 +1,16 @@
+require 'rubygems'
 require 'rspec/core/rake_task'
+require_relative 'lib/unitypods/version'
+
 RSpec::Core::RakeTask.new
 task :default => :spec
+
+desc "Build the gem"
+task :build do
+  system "gem build unitypods.gemspec"
+end
+
+desc "Build and install the gem"
+task :install_local => :build do
+  system "gem install -l unitypods-#{Unitypods::VERSION}.gem"
+end