Scalate template path should be normalized

```
findTemplate("/root/index.html.spp")
```

Scalate could not find template, because template path is invalid. It should be normalized "/".

```
2013-11-20 16:35:45,098 DEBUG [qtp629428158-20] o.f.s.s.ServletResourceLoader [Logging.scala:143] realPath for: /WEB-INF/views//root/index.html.ssp is: null
2013-11-20 16:35:45,100 DEBUG [qtp629428158-20] o.f.s.u.ResourceLoader [Logging.scala:143] Trying to load uri: /WEB-INF/views//root/index.html.ssp
```