just mv

* tests/unit/bootstrap.php -> tests/bootstrap.php
* tests/unit/src -> tests/src
rm tests/unit/run
fixed namespaces

* `find tests -type f -exec sed -i 's/Unit\\//g' '{}' \;`
* `find tests -type f -exec sed -i 's/\\Unit;/;/g' '{}' \;`
added pimple/pimple into composer.json
fixed defected test
Merge pull request #19 from tamakiii/hotfix/18_remove_unit_dir

Hotfix/18 remove unit dir