Convert "web_interface.rb" to the classic style, non-modular, web-app
- create "ConfigurationHelpers" module and include it in all interfaces
- add TODOs for the "command_line_interface" to "configuration_helpers"
  refactoring
- add test stub for "WebInterface"
Ensure that the "_spec" suffix is present on the end of all test-files
Rename "start" to "run" in "command_line_interface.rb" for consistency w/ "web_inteface.rb"
Remove she-bang line from "command_line_interface.rb" it [intentionally] isn't marked as executable
Clean up comments in "application.rb"