factor WhereTrait into WhereInterface
factor ValuesTrait into ValuesInterface; bugfixes
remove duplicate property
factor OrderByTrait into OrderByInterface
factor ReturningTrait into ReturningInterface
factor LimitTrait and LimitOffsetTrait into LimitInterface and LimitOffsetInterface; clean up
fix typos, add missing annotations, clean up
convert to traditional array() syntax
traditional array syntax in test-suite
clean redundant interface declarations; passing all unit tests under PHP 5.3 and PHP 5.4
Merge pull request #8 from mindplay-dk/5.3-compat

PHP 5.3 compatibility, esp. removal of traits in favor of interfaces.