BUG Allow PHPUnit installation with composer / Fix travis
Merge pull request #3090 from tractorcow/pulls/2.4-phpunit

BUG Allow PHPUnit installation with composer / Fix travis
Removed php5.2 incompatible syntax
Merge pull request #3099 from tractorcow/pulls/2.4-php52fix

BUG Removed php5.2 incompatible syntax
MINOR Use composer @stable for PHPUnit

Using stable will allow some packages to be downloaded as zips instead of clones all the time.