Adding dummy Rails app for specs
specs for version; with_versioning helper for rspec

Conflicts:
	paper_trail.gemspec
Improving the structure and syntax of the RSpec helper, modifying it to work with rspec in addition to rspec-rails
Updating dummy app config files to remove unnecessarily railtie require statements and reflect the syntax of the default Rails4 config files
cucumber helper for with_versioning()
Restructuring Cucumber helper and adding a before hook to mimic the RSpec helper
Simplifying the RSpec helper code, adding better spec coverage for it