Adhers to the specification

[kettanaito]

• Implements Universal Path specification.

Changes

• The library now adheres to the route parameters specification.
• Adds path parsing step to reduce a path string to the list of tokens.
• Supports optional parameters.
• Supports zero-or-more parameters.
• Supports one-or-more parameters.

[kettanaito]

The tests are failing because the multiple optional path parameters feature is not currently implemented.