issues/134: Add a router/muxer with a bit more functionality

[komuw]

What:

• Add a router/muxer with a bit more functionality

Why:

• Fixes: create router #134

How:

• The muxer/router added is mainly taken/based from matryer/way[1]
• The main differences are:
  • this router does not support ... suffix in uri paths
  • this router always adds a / prefix and suffix.
  • this router does have the ability to detect conflicts[2]
  • this router does not use * as a way to specify that a handler handles all http methods.
  • this router does not admit/reject requests based on http methods.It should be up to the handler itself to reject/admit a request based on http method.

ref:

1. https://github.com/matryer/way
2. https://www.alexedwards.net/blog/which-go-router-should-i-use

[komuw]

@komuw