added topics and resources to Week 6
removed RWD markdown link
Update Introduction

- Remove double Github link
- Change wording on classroom structure
Merge pull request #13 from NanoXD/master

Update Introduction
Merge pull request #10 from jlembeck/master

Week 12 begins -- JavaScript
Update Bash

- Markdown parser has issues with bolding something after parentheses.
  escaping the characters did not work so HTML was added.
- I took a poll of five people which concluded they would use the word "folders" in place of directories.
- Change meaning of [terminal](http://en.wikipedia.org/wiki/Computer_terminal).
- Add intro to `man` pages.
- Add reference to ExplainShell
Merge pull request #14 from NanoXD/Bash

Update Bash
Create testing_wiki.md

Wiki for Testing Practices & Study.
Specify which type of variable is shared with the view.
Fix grammatical errors.

'need' to 'needs'
'controllers' to 'controller's'
Merge pull request #21 from Ada-Developers-Academy/rails_cleanup

Rails: Fixes to controller section
Rename testing_wiki.md to testing_resources.md
Update testing_resources.md
Update introduction.md

Adding a missing word.
Update introduction.md

Add Presentations and Community Involvement expectations.
Merge pull request #20 from jags14385/master

Create testing_wiki.md
Adding Accessibility Section

Added the Accessibility Section. Feel free to add more :).
added IRC instructions to introduction.md
incorrect week label
Nitpicky grammar fix