Make it work for inserting and updating a table of contents

• Calculate the starting point and ending point of the TOC
• Calculate the new size between the delimiters, based on the length of the TOC and the difference between the ending point and the starting point
• Move the content ahead, if necessary
• Write to the file

Write the README.md using the table of contents generator

• Write about what it does
• How to install it
• How to use it
• Advantages between this build and other ones that already exists
• Explain the usage of HTML tags and show the tests in that site

Change macros to static const variables