update to rspec2
renamed method to #as_yaml, Object#to_yaml converts an object to YAML
removed spec opts
ruby 1.9.2. - fixed failing specs
BF Merge branch 'rspec2' of github.com:mstark/metric_fu into mstark-rspec2

Conflicts:
	spec/base/configuration_spec.rb
Merge branch 'mstark-rspec2'