* Improve level1.js

* Fix incorrect [0] when using document.querySelector

* typo

+ Change `==` to `===` and `!=` to `!==`.
+ Add note about not using `==` and `!=`.
+ Add point about the result of a comparison operator being a boolean.
+ Some whitespace cleanup.

* Use Crockford terminology: "Vars which are not explicitly initialized are given the value undefined." https://www.crockford.com/javascript/survey.html

* Change casing of Boolean reserved words. Add section for Boolean NOT operator.

+ Change `var` for `let` or `const` in all sections.
+ Add comment about older `var` keyword.
+ Add section about constants.
+ Add explanation about arrays being reference types.
+ Add explanation about DOM elements being reference types.

* Rebranging styles

* Changing Facebook link

* Change footer bg color from grey to purple

* Add new link for slides on Google Slides

* Update twitter Sydney

…a mentor (we asked all the coders to install VS Code at the start of the day) (#36)

1. Todo Highlight - Make it easier to see the points where code should be tried.
2. Code Spell Checker - A lot of problems were down to simple spelling mistakes, might help make the process smoother.
3. Prettier - Formatting makes a huge difference on the readability of the code, this should help automate some of the formatting for new coders.

* Some updates to the instructions, a lot is just markup.

* Suggestions to improve level1.js

* A few more details to level1.js

* Suggestions to improve level2.js

* Suggestions to improve level3.js

Fix table with Browser Console options