Added initial support for Persistence.UmbracoGlass

Repository provides basic implementation, but will need attention on:
- logging (no ILogger impl for Umbraco yet)
- Query (investigate 'Examine' possiblities)
- Evict (looks like Umbraco does not cache data?)

Also added DefaultSetupTasks for registering ServiceProvider and utilizing RepositoryGenerator

Depends on:
https://github.com/mikeedwards83/Glass.Mapper/tree/develop
https://github.com/mikeedwards83/Glass.Mapper/pull/47