Typo and grammar fixes
Rewritten / worded most of the page

There were a lot of improvements to be made-

- Some english grammar was still not quite right
- Made sure html highlighting was used for all code examples
- A lot of technical mistakes, e.g confusing / conflating
  html elements and tags, recommended the charset meta element
  after the title, instead of as soon as possible after head
- Attributes were not explained very thoroughly
- Included a complete example of a HTML document
- Removed <b>, <i>, and <img> section, I think this could be
  expanded into a 'crash course' page on the most common html
  elements.