Update 07-03-01-Exceptions.md

Change misleading comment.
Update 09-04-01-Complementary-Testing-Tools.md

Updating link to the PHPUnit-Selenium integration page to the current version of PHPUnit
added link to symfony coding standards
Add Mavericks PHP version to Mac Setup.
Update 03-06-01-XDebug.md

Corrected MacGBDp to MacGDBp
Merge commit '12414b2f6cf528ab1109818474fd60b53555e16a' into gh-pages

Conflicts:
	_posts/01-04-01-Mac-Setup.md
	_posts/03-06-01-XDebug.md
	_posts/07-03-01-Exceptions.md
	_posts/09-04-01-Complementary-Testing-Tools.md