Install task

Author: qrush

Diff for: Rakefile

@@ -11,3 +11,8 @@ Rake::TestTask.new do |t|
   t.libs << "test"
   t.test_files = FileList['test/*_test.rb']
 end
+
+desc "Install shp"
+task :install do
+  sh "cp target/shp /usr/local/bin/shp"
+end