requrie versions dynamiclly; modified interface more ruby friendly
improve README.md
Merge branch 'modified_structures' of github.com:zcpdog/lob-ruby into add-sam-support

Conflicts:
	lib/lob.rb
	spec/lob_spec.rb
remove unused Lob module in tests
Merge pull request #40 from bsiddiqui/require-files-dynamically

Require files dynamically