Merge pull request #1 from wagnert/master

Add PHPUnit tests
Merge pull request #2 from wagnert/master

Make PSR-2 compatible + minor changes
Merge branch 'master' of https://github.com/techdivision/TechDivision_Storage into techdivision
Merge pull request #3 from wagnert/master

Add .buildpath to .gitignore
Update composer.json
Refactoring StackableStorage
Merge branch 'master' of https://github.com/techdivision/TechDivision_Storage into techdivision
Merge branch 'techdivision'