LogicException on ambiguous values
Merge pull request #13 from marc-mabe/unique

LogicException on ambiguous values
Singleton
Enums as singletons are not cloneable
Removed unused argument
fixed method clear + tests, removed unused test enum
PHP 5.3 is required
optimized unique check + better exception message
fixed clear - if two classes begins with the same name
Namespaces: As of the singleton implementation requires PHP 5.3 we can switch to namespaces
added test for __clone
Merge branch 'singleton' of github.com:marc-mabe/php-enum into namespaces
updated after merge from singleton branch
Merge pull request #14 from marc-mabe/singleton

Singleton
Merge pull request #15 from marc-mabe/namespaces
Merge branch 'master' of github.com:marc-mabe/php-enum into EnumMap
EnumMap extends SplObjectHash