Organization

[cdterry87]

Would like to restructure this project a bit.

Start by extracting each section out into its own .md file (i.e. HTML.md, CSS.md, JavaScript.md, PHP.md, etc.) and move the various resources for each of those sections into their own file so it's not just one big long file like it is now.

Then the initial README.md file can act as a "Table of Contents" that will have links to each of the other *.md files so you can just click on one of the categories in the list and it'll load the appropriate .md file's resources.