Add RSpec support files

spec/spec_helper.rb

@@ -0,0 +1,8 @@
+require 'rspec'
+
+Dir[File.join(File.dirname(__FILE__), "..", "lib", "progress_bar.rb")].each {|f| require f}
+Dir[File.join(File.dirname(__FILE__), "..", "spec", "support", "**", "*.rb")].each {|f| require f}
+
+Rspec.configure do |c|
+  c.mock_with :rspec
+end

spec/support/focused.rb

@@ -0,0 +1,7 @@
+RSpec.configure do |config|
+  # Configure RSpec to run focused specs, and also respect the alias 'fit' for focused specs
+  config.filter_run       :focused => true
+  config.alias_example_to :fit, :focused => true
+  config.alias_example_to :pit, :pending => true
+  config.run_all_when_everything_filtered = true
+end