Update 12-01-01-Community.md

A little bit of grammar cleanup. Added a link to the web irc freenode client and stackoverflow.
Merge pull request #250 from mkaatman/patch-2

Update 12-01-01-Community.md
Update Composer advice

Notable changes:
* Use composer itself to create `composer.json` file.
* Brief mention of flexible versioning
* Brief mention of the security advisory checker
* Brief mention of how to update
Merge pull request #252 from inanimatt/composer

Update Composer advice
Removed trailing whitespaces.
Enhanced the example for the Singleton design pattern.

- Moved static variable into the static creation method getInstance.
- Replaced "new self();" with "new static" (late static binding to allow
subclassing).
- Changed visibility of __construct to protected.
- Added the two private methods __clone and __wakeup.
- Added DocBlock comments.
- Updated description and enhanced with links to the PHP manual.
Merge pull request #253 from FlorianWolters/gh-pages

Enhanced the example for the Singleton design pattern.
Merge branch 'gh-pages' of https://github.com/codeguy/php-the-right-way into gh-pages

Conflicts:
	_posts/12-01-01-Community.md