Mux rework

Moved headers and statuses to the status and header package
Speed improvement with the built in go mux

What's Changed

• Added File Serving and Requiring Middlewares by @tobyguelly in #6
• Solving Issues of #8 and #10 by @wellisrite in #14
• Fix panics on response.go file method by @wellisrite in #15
• Inline Responses by @ninjarogue in #19
• Inline Html, Message, and String by @ninjarogue in #21
• Improved Error and XML Responses by @ninjarogue in #22
• Fixed return statement by @ninjarogue in #23
• Improvement of Error Responses by @ninjarogue in #24
• Revert "Improvement of Error Responses" by @gebes in #26
• Revert "Fixed return statement" by @gebes in #27
• Revert "Improved Error and XML Responses" by @gebes in #28
• Resolved conflicts #31 by @gebes in #32
• Revert "Resolved conflicts #31" by @gebes in #33
• v2.2 by @ninjarogue in #31

New Contributors

• @tobyguelly made their first contribution in #6
• @wellisrite made their first contribution in #14

Full Changelog: v2.1.3...v2.2.0