Add support for folder / file authentication (Windows)

If you open a project that includes a network folder in Sublime Text (2) in Windows, and the folder requires authentication, ST2 will not prompt you for said authentication or present any information about the authentication being required.  Instead, it hangs on refresh / reload and, once out of the hang, does nothing. 

A work around to this is to remove the folder from the project and re-add it.  ST2 notices the authentication is required, Windows prompts for it, and upon entering it the folder can be added.  Rather inconvenient, though!

Expected: ST2 shows some special marking for an authenticated-required folder and, if un-authenticated or it cannot open it, prompts the user with a message.  This is assuming the windows authentication can be identified as the problem, which I am unsure exists in the windows API.