Updates * naming convention to make exception for any constant

The current README makes an exception to the NSString *text convention for global NSString constants, but the convention should be generalized to all constants.
Merge pull request #11 from MaxGabriel/patch-1

Updates * naming convention to make exception for any constant
We're hiring.
Hyphen
Merge pull request #13 from NYTimes/hiring

We're Hiring
Altered ivars being accessed directly in init.
Added more general terms of 'init' and gave reference.
Merge pull request #16 from jacobvanorder/master

Altered ivars being accessed directly in init.
Update README.md

Added a Ternary operator section to Conditionals.
Update README.md

Fixed a spelling issue
Update README.md

Fixed the TOC Ternary Operator link
Added comments to the Table of Contents.
Add link to clarify the NARC acronym/mnemonic
Merge pull request #25 from jawwad/add-narc-link

Add link to clarify the NARC acronym/mnemonic
Greater explanation for conditional reasoning.
Tweaks to Brian's additions
Merge pull request #27 from NYTimes/one-line-conditionals

Deeper explanation for one-line conditional reasoning.
Added contributors.
Update README.md
Removed non-existent sections from the ToC.