Cannot find module in version 0.2.2

I am getting the below error with version 0.2.2 when using following:

```
ioc.use('util', ioc.dir('app/util'));
```

This was working in version 0.2.0

The exception is:

```
Error: Cannot find module 'C:\code\test\app\util'
at Function.Module._resolveFilename (module.js:339:15)
at Function.Module._load (module.js:290:25)
at Module.require (module.js:367:17)
at require (internal/module.js:16:19)
at Object.app [as load] (C:\code\test\node_modules\electrolyte\lib\sources\dir.js:46:12)
at Container._loadSpec (C:\code\test\node_modules\electrolyte\lib\container.js:194:18)
at Container.create (C:\code\test\node_modules\electrolyte\lib\container.js:121:10)
at FactorySpec.Spec.create (C:\code\test\node_modules\electrolyte\lib\spec.js:83:24)
at Container.create (C:\code\test\node_modules\electrolyte\lib\container.js:131:18)
at FactorySpec.Spec.create (C:\code\test\node_modules\electrolyte\lib\spec.js:83:24)
at Container.create (C:\code\test\node_modules\electrolyte\lib\container.js:131:18)
at FactorySpec.Spec.create (C:\code\test\node_modules\electrolyte\lib\spec.js:83:24)
at Container.create (C:\code\test\node_modules\electrolyte\lib\container.js:131:18)
at Object. (C:\code\test\app\main.js:9:18)
at Module._compile (module.js:413:34)
at Object.Module._extensions..js (module.js:422:10)
at Module.load (module.js:357:32)
at Function.Module._load (module.js:314:12)
at Function.Module.runMain (module.js:447:10)
at startup (node.js:141:18)
at node.js:933:3
```

Start by reproducing the ioc.use('util', ioc.dir('app/util')) example with versions 0.2.0 and 0.2.2. Trace the failure from lib/sources/dir.js:46 and compare the directory-loading path between releases; done means the 0.2.2 example resolves app/util without the reported module error and has regression coverage.

Written by the indexing model from the issue text.