Adds initial chapter text: what, why, PSRs, Bio, References
Expands on Why should I care?
Adds section: Why This Matters To Me
Expand on why coding standards matter
Adds links and some rewording
Fixes typos and adds PSR-1 section
Adds PSR-2 section
Adds PSR-3 section
Adds chapter next/prev
Adds section describing PHP_CodeSniffer
Update coding-standards.md

Fixed a few typos.
Update coding-standards.md
Merge pull request #2 from GideonPARANOID/patch-1

Proof read corrections
Merge pull request #11 from Bendihossan/coding-standards

First draft: Coding standards