How I replaced this package with go:embed

[prashantgupta24]

Hopefully this issue and PR helps those who want to transition from statik to go:embed.

My motivation?

2 fold:

1. This issue - In short, the Walk function in statik did not include files without extension for some reason.
2. Remove another external dependency

It wasn't easy, but it's doable. In the end, I managed to get all features working with go:embed

countertenor/mozart#53