Update 07-03-01-Exceptions.md

Change misleading comment.
higher order functions

Functions using functions as input and/or output are higher order functions.
link to openshift fixed
Added a note about VersionEye for Composer
Composer and Pakagist, fix typo
Merge pull request #343 from tonicospinelli/fix-typo

fix typo
Added Propel to the list
Merge pull request #346 from kfuchs/patch-1

Added Propel to the list
Hi PSR-0, this is PSR-4. I'm coming for you.
s/d/s.
Merge pull request #321 from peterkokot/patch-2

Link to openshift fixed
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
Renamed posts to allow Dependency Injection to be added
Missed a rename
First draft - Resolves #280
Revisions
Typos and further change re comments