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
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
Fix DI typo
Fix DI typo
Fixed link for Enhance PHP

Thanks to @w00 for pointing this one out in #332.
Remove an extraneous 'to'; rectify an instance of an incorrect verb tense; small adjust to punctuation.

Original text noted that it's "usually a good idea to follow to common patterns". Removed extra 'to'. 

In MVC section the sentence "The model-view-controller (MVC) pattern... let..." should be changed to "The model-view-controller (MVC) pattern...lets..."

Also added a semicolon to a sentence in the Factory section that Strunk and White would agree enhances the clarity of the sentence.
Updated mwop's Twitter account
coding style fix
Update GA snippet