If a directory is requested, check if index.html exists

[amygrinn]

Also simplified the pathname.

[alallier]

Thanks for the PRs, I hopefully should have some time this week to check them out

[alallier]

@taylorgrinn can you describe what you were trying to do here? Reload always watches a directory and attempts to open the index.html by default if an alternative start page is not defined in the command line options

[cekvenich2]

@alallier This is common issue for dev.
This works:
http://154.12.250.248:8080/desEx/index.html
This does not:
http://154.12.250.248:8080/desEx
http://154.12.250.248:8080/desEx/

In production, we would not want to have index.html, we have just the url w/ 'real' http server. So development nav using reload CLI and product nav is not same. A work around is not to use the CLI but write your own dev server. Ideally, I can just use the CLI.

[alallier]

Closing in favor of #326