Learn Nodejs Hard Way Versions Save

• Adds chapter 07.0 - Exercises
• Include two exercises
  • Implement Inserting
  • Implement Searching

• Adds chapter 6.3 - Improving the Router api
• Adds chapter 6.4 - The need for a Trie

• Velocy has a small implementation of the actual router
• Adds chapter 6.1 with partial content

• Shows inline code with background on both light and dark versions of the PDF.

• Adds the content for chapter 6.4 - Headers
• Fixes code snippet based on #22
• Corrects jsdoc section, and the explanations based on #21

• Adds the chapter 6.3 - MIME type and Content-Type
• Adds explanation about the charset="utf-8" in Content-Type

Updates the code to use the [\.:]+ regex expression for replacing : and . while creating log files as per #19

• Reduces the PDF size to 50%
  • compress images before rendering into the book
• Adds chapter 6.3 user-agents

Fixes the directory structure as proposed at #18