ContainerBuilder: removed needless checking of service's type
ContainerFactory: rewritten caching mechanism to not use fopen [Closes #27]
added ContainerLoader: humble replacement for ContainerFactory
travis: code-checker checks whole repository
ExtensionsExtension: Allow passing parameters to extension constructor
Merge pull request #30 from xificurk/ExtensionsExtension-patch1

ExtensionsExtension: Allow passing parameters to extension constructor
ContainerBuilder::findByType() returns all services as [name => definitions] [Closes #21]