Fix some incorrect docblock variable names.
Merge pull request #20 from nubs/fix-documentation

Fix some incorrect docblock variable names.
Clean up unit test doc blocks
Force @covers tags
Fix phpdoc for $key params
Add Arrays::getIfSet
Merge pull request #23 from chadicus/arrays

Arrays::getIfSet
Setup for scrutinizer ci.
Add poser.pugx.org composer badges.